Home
Supplier Discovery
Electrical & Electronics
Extension Socket
Plug Socket Protection Factories & Companies
Filter
Category
Consumer Electronics
Construction & Decoration
Electrical & Electronics
Manufacturing & Processing Machinery
Security & Protection
More
Management Certification
Others
ISO9001:2015
ISO14001:2015
ANSI/ESD
ISO 9001
More
R&D Capacity
OEM
ODM
Own Brand
Others
Annual Revenue
<1 Million USD
1 ~ 2.5 Million USD
2.5 ~ 5 Million USD
5 ~ 10 Million USD
10 ~ 50 Million USD
More
No.of Employees
Less than 5 People
5-50 People
51-200 People
201-500 People
501-1000 People
More
Province & Region
Anhui
Beijing
Chongqing
Fujian
Gansu
More
about plug socket protection
Technological Innovation
Reliable Supply Chains
Substantial Manufacturing Capabilities
plug socket protection
1,000+ factories verified
Zhongshan Dongsheng Town Mingze Hardware Products Factory
16 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Stamping and Processing of Copper Parts for British Standard Socket Hardware and Spring Inserts Power Plug Overload Protection Socket Accessories
US$
1.00
-
2.00
5,000 Pieces
(MOQ)
British Standard Socket Accesso Environment Protection Hardware Accessory Plastic Shell Long Term Durability Metal Stamping PCB Board Power Plug
US$
1.00
-
2.00
5,000 Pieces
(MOQ)
Versatile Universal Socket for Customizable Home and Auto Projects
US$
2.00
5,000 Pieces
(MOQ)
Plug-in Board Socket Accessory Processing Factory
US$
1.00
30,000 Sets
(MOQ)
1/4
Guangdong Ldnio Electronic Technology Co., Ltd.
16 yrs
·
4.9
·
Manufacturer/Factory & Trading Company
Send Inquiry
Universal Ldnio International 2500W Universal Power Strip Socket Multi-Plug Extension Cord with Overload Protection & 6 AC Outlets Power Extension Strip Socket
US$
3.77
-
4.07
10 Pieces
(MOQ)
Ldnio Sk1 High Power Socket UK Plug Extension Boards Rate Power (2500W 10A) Solution with Surge Protection and USB Charging Port
US$
8.51
-
8.94
10 Pieces
(MOQ)
Ldnio Sc2 Tower Socket Extension Lead Surge Protection Extension Lead with Switch (10A 2500W) 4 AC Outlets & 3 USB Ports Plug Socket Extension
US$
8.51
-
8.94
10 Pieces
(MOQ)
Ldnio Sk4396 UK Plug 2500W Electrical Tower 4 Sockets & 3 USB Fast Charge Ports Overload Protection Power Extension Strip Socket
US$
10.14
-
10.42
10 Pieces
(MOQ)
1/4
Zhejiang Jiuji Electric Co., Ltd.
11 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Jiuji Tuya Refrigerator Smart WiFi Socket Voltage Safeguard Protection Socket Plug for Home
US$
12.00
-
15.00
1 Piece
(MOQ)
Jiuji Jjsva-16 Plug-in Voltage Protection Wall Socket Type E for TV Air Condition Refrigerator
US$
5.00
-
8.00
1 Piece
(MOQ)
Jiuji Custom Refrigerator Guard Socket Surge Protection Plug Socket for Home Appliance
US$
12.00
-
15.00
1 Piece
(MOQ)
Jiuji Surge Voltage Protector Power Strip with USB Fast Charging Over Under Voltage Over Current Protection Plug Socket
US$
9.00
-
15.00
1 Piece
(MOQ)
1/4
Yueqing Fiy Electric Co., Ltd.
8 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Ce TUV 16A IP44 Waterproof Euro German Schuko Electrical Power Outlet Socket Receptacle for Industrial Generator Plug with Children Protection (050201)
US$
0.30
-
3.00
100 Pieces
(MOQ)
Ce VDE 16A IP54 Waterproof Euro German Schuko Electrical Power Plug Outlet Socket Receptacle for Industrial Electromobile with Protection Gates (050301)
US$
0.30
-
2.00
100 Pieces
(MOQ)
Ce VDE 16A IP54 Waterproof Euro German Schuko Power Plug Outlet Socket Receptacle for Industrial Electrical Generator with Protection Gates (050301)
US$
0.30
-
2.00
100 Pieces
(MOQ)
(050201 Round) Ce TUV 16A IP44 Waterproof Euro German Schuko Electrical Power Outlet Socket Receptacle for Industrial Generator Plug with Children Protection
US$
0.30
-
3.00
100 Pieces
(MOQ)
1/4
Wenzhou Zhongzhe Electric Co., Ltd.
7 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Ke-2155 Series Universal Plug and Socket for Household 110V/220V Voltage Stabilization Protection
US$
2.70
-
3.00
500 Pieces
(MOQ)
American Standard Lightning Protection, Surge Protection, Overvoltage Protection, Safety Socket with Switch Strip Plug
US$
2.31
1,000 pieces
(MOQ)
Automatic Voltage Protector Socket Switch AC 220V 16A Power Surge Protection Brazilian Plug Socket
US$
1.82
1,000 pieces
(MOQ)
Refrigerator Voltage Protector Multifunctional Washing Machine Protection Socket American Plug AC 120V
US$
2.31
3,000 pieces
(MOQ)
1/4
Zhongshan Jianyi Longfei Wire Co, . Ltd
6 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
53 Type-C Fast Safety Charge Multi Plug Short Circuit Protection Power Socket
US$
5.50
-
6.00
100 Pieces
(MOQ)
100-250V 2500W Overload Short Circuit Protection Mains Plug with USB Socket
US$
3.50
-
3.80
100 Pieces
(MOQ)
Factory Price Multi Plug Overload Protection Power Socket with USB
US$
5.30
-
6.00
100 Pieces
(MOQ)
2500W 230V Overload Protection EU Multi Extension Power Plug and Socket
US$
2.97
-
3.23
100 Pieces
(MOQ)
1/4
WANSHUN ELECTRICAL & INTELLIGENT MANUFACTURE (GUANGDONG) CO., LTD.
Send Inquiry
3 Way Individual Switch UK T-Type Plug Socket with Surge Protection
US$
2.44
-
2.52
1,200 Pieces
(MOQ)
Plug Socket Lightning Protection T Type Socket
US$
2.44
-
2.52
1,000 Pieces
(MOQ)
IP44 5 Way UK Extension Socket with Main Switch
US$
4.70
-
5.00
1,000 Pieces
(MOQ)
Power Reset Button Slots Built-in Door 13/16A Multi Plug Safe Extension Socket
US$
1.00
-
1.30
5,000 Pieces
(MOQ)
1/4
Yueqing Beibaixiang Xingpeng Electrical Switch Factory
23 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
250V Germany Safety Schuko Plug Wall Socket with Protection Cover
US$
1.04
-
1.06
10 Pieces
(MOQ)
Tempering Glass 250V French Safety Plug Wall Socket with Protection Cover
US$
2.14
-
2.20
10 Pieces
(MOQ)
European Standard 250V Schuko Plug Wall Socket with Protection Cover
US$
1.04
-
1.06
10 Pieces
(MOQ)
GFCI American 16AMPS 20AMPS Self Test Wall Mount Plug Socket
US$
4.80
-
5.00
100 Pieces
(MOQ)
1/4
Zhejiang Changcheng Trading Co., Ltd.
8 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Ycld Universal Wall Socket with Multi-Plug Compatibility and Overload Protection
US$
0.19
-
1.56
600 Pieces
(MOQ)
Good Price 16A Modular Design Compact Multi-Plug Wall Overload Protection Waterproof Socket
US$
0.19
-
1.56
600 Pieces
(MOQ)
High Performance Durable Housing Flame Retardant Material Plug Double Overload Protection Socket
US$
0.19
-
1.56
600 Pieces
(MOQ)
Hot Sale Impact-Resistant Plastic Flame Retardant Material Multi-Plug Overload Protection Switch Universal Socket
US$
0.19
-
1.56
600 Pieces
(MOQ)
1/4
Zhejiang Leiertai Lightning Protection Technology Co., Ltd.
17 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Lmstz Series Switch Socket Outlet Electrical Plug for Lightning Protection
US$
8.80
-
18.80
100 Pieces
(MOQ)
Lmstz12-a Series High-Quality Electrical Sockets Plug for Lightning Protection
US$
8.80
-
18.80
100 Pieces
(MOQ)
Lmstz11-B Series Multi-Function Lightning Socket Switch Plug for Electrical Lightning Device
US$
8.80
-
18.80
100 Pieces
(MOQ)
Lmstz12-B Series High Voltage Sockets Electrical Outlets with Multi-Function Protection
US$
8.80
-
18.80
100 Pieces
(MOQ)
1/4
Wenzhou BXST Co., Ltd.
18 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Bxst Socket Plug Voltage Protector for TV Refrigerator Protection Digital Voltage Protector
US$
3.74
-
3.97
500 pieces
(MOQ)
220V 10A 60Hz Over Under Voltage Protection Voltage Protector Plug and Socket for Home Use
US$
2.59
-
2.69
2,000 Pieces
(MOQ)
Bx-V069 120V Refrigerador TV Over and Under Voltage Protection Automatic Voltage Protector CE USA Socket Outlet Plug with Socketpopular
US$
5.00
50 Pieces
(MOQ)
Bxst-V111 TV Guard Power Surge Protector Socket Wholesale China Factory
US$
2.00
-
5.00
2,000 Pieces
(MOQ)
1/4
Foshan Nanhai Guanglong Electrical Appliance Factory
24 yrs
Send Inquiry
4 Way Gang Plug Extension Socket Lead with Individual Switches Surge Protection
US$
2.95
1,500 Pieces
(MOQ)
6 Outlet Black Power Strip 6 Plug Socket Manufacturer with Surge Protection Trailing Socket
US$
5.00
1,500 Pieces
(MOQ)
504m Power Extension Cable Socket with Surge Protection Electric UK
US$
3.87
24 Pieces
(MOQ)
Extension Socket High Quality Manufacturer Power AC Outlet Surge Protection
US$
4.28
1,500 Pieces
(MOQ)
1/4
Wenzhou Senyi Electric Co., Ltd.
Send Inquiry
Voltage Switcher Refrigerator Transformer Protector Delayed EU Plug Protection Power Socket
US$
2.40
100 Pieces
(MOQ)
Adjustable Voltage Protector Socket 16A Over/Under Voltage Protection AC 110V-220V EU Plug
US$
3.82
-
4.00
50 Pieces
(MOQ)
Adjustable Voltage Protector Socket 16A AC 110V-220V EU Plug with Surge Protection
US$
3.82
-
4.00
50 Pieces
(MOQ)
Automatic Voltage Current Protector Socket AC 110V 220V Adjustable 16A Power Surge
US$
3.40
100 Pieces
(MOQ)
1/1
Qinshan Cable Group Co., Ltd.
19 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
British Standard Type 13A USB Overload Protection Socket Plug Board American Standard British Standard Dragging Cable Row Plug and Socket Manufacturers Wholesal
US$
0.10
-
8.00
2,000 Pieces
(MOQ)
Israel 2 Outlets Power Socket Security Protection Extension Socket with Copper Plug Power Strip
US$
0.10
-
8.00
2,000 Pieces
(MOQ)
3 Ports Power Strip Sockets Protection Extension Socket for Israel Power Strip
US$
0.10
-
8.00
2,000 Pieces
(MOQ)
Power Strip Surge Protector French 5 Way Extension Cord Power Extension Socket with Surge Protection
US$
0.10
-
8.00
2,000 Pieces
(MOQ)
1/4
Yueqing Juqi Electrical Co., Ltd.
9 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
High Quality UK Standard 240V Water Heater Electric Plug Safety Leakage Protection One Bill Control Socket NF-EL5b-13 Made in China
US$
0.10
-
1.00
1 Piece
(MOQ)
European Standard Charging Plug with Socket 5V2.4A Fast Charging Plug Charger Leakage Standard Home Hotel Leakage Protection Charger S13
US$
0.10
-
1.00
1 Piece
(MOQ)
3.2-Inch Square with 3 Different Linear Safety Sockets Factory Directly Sale Design Outlet GFCI Breaker with 13A 250V Pure Copper CE Certificate NF-EL5u-13
US$
0.10
-
1.00
1 Piece
(MOQ)
EU 3 Holes Conversion Plug Nandao 13A 50Hz 240V Prcd Plug Series Plug and Socket Integrated Portable GFCI Plugs Socket
US$
0.10
-
1.00
1 Piece
(MOQ)
1/1
Shouning Songyan Electric Apparatus Co., Ltd.
22 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Surge Protection Germany Plug Power Strip Extension Socket
US$
1.00
-
3.00
100 Pieces
(MOQ)
16A 3500W Germany Socket European Plug Power Strips with USB
US$
1.00
-
3.50
100 Pieces
(MOQ)
Hot Sale Germany Plug Wall Socket with 2 USB Ports Travel Adapter Plug
US$
0.23
-
0.24
1,000 Pieces
(MOQ)
6 Way Extenstion Board European Power Extension Cord Socket
US$
1.00
-
2.00
100 Pieces
(MOQ)
1/4
Orient Tech Limited
15 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Smart Socket with WiFi Remote Control, Overload Protection, Smart Home Plug.
US$
11.77
-
12.46
500 Pieces
(MOQ)
EU Smart Socket 10A with Energy-Saving Monitoring for Efficient Use
US$
4.90
-
6.31
5 pieces
(MOQ)
Smart WiFi Socket with Energy Monitoring for Alexa
US$
1.50
-
5.30
1,000 pieces
(MOQ)
Us Smart Socket Smart WiFi Plug with Tuya APP Control for Alexa
US$
3.59
-
3.99
500 pieces
(MOQ)
1/4
Zhongshan Lonpower Technology Co., Ltd.
Manufacturer/Factory & Trading Company
Send Inquiry
American Standard Socket Overload Protection Switch, Lightning Protection and Leakage Protection Busbar Plug
US$
1.80
-
2.50
1,000 Pieces
(MOQ)
German and European Standard Four Position Lightning Protection Socket
US$
5.23
-
5.35
500 Pieces
(MOQ)
American Standard Lightning Protection Wall Socket 8-Position
US$
5.58
-
5.68
1,000 Pieces
(MOQ)
American Standard 12 Position Vertical Socket with USB
US$
12.79
-
12.89
2,000 Pieces
(MOQ)
1/4
Yueqing Beigang Electric Co., Ltd.
6 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
380~415V 16A IP44 Corrosion Protection Waterproof Industrial Plug Socket
US$
7.50
-
7.60
500 Pieces
(MOQ)
Industrial Plugs and Sockets Electrical Portable Extension Socket Box Flexible Circuit Breaker Distribution Socket
US$
201.00
-
202.00
1 Piece
(MOQ)
Wall Mounting Control Panel Electrical Circuit Breaker Equipment Metal Intelligent Terminal Plug with Socket Enclosure
US$
202.00
-
203.00
1 Piece
(MOQ)
Waterproof Portable Outlet, Wall Mounted Industrial Plug Socket Box with Residual Current Protection
US$
108.00
-
109.00
1 Piece
(MOQ)
1/4
Ningbo Link Communication Equipment Co., Ltd.
Send Inquiry
Smart Display Power Distribution Unit Power Board Socket with Surge Protection EU/Us Plug 2m Line
US$
8.00
-
18.00
10 Pieces
(MOQ)
Supply French Household PDU Wiring Plug Socket Lightning Protection
US$
8.00
-
18.00
10 Pieces
(MOQ)
Universal Power Dome PDU with Overload Protection and UK Plug
US$
1.00
-
10.00
10 Pieces
(MOQ)
Lightning Protection PDU Cabinet Socket High-Power Industrial Plug and Row Power Socket
US$
8.00
-
18.00
10 Pieces
(MOQ)
1/4
YUEQING GUANGTAI IMPORT & EXPORT CO., LTD.
5.0
Send Inquiry
Surge Protection Power Strip Outlet Extension Socket for Us Plug
US$
23.00
-
25.00
1,000 Pieces
(MOQ)
Surge Protector Us Plug Multi Extension Cord Power Socket
US$
1.30
-
1.50
1,000 Pieces
(MOQ)
Good Quality 15A/125V USA Power Strip Extension Socket with Switch
Negotiable
1,000 Pieces
(MOQ)
6 Ways Surge-Protection Extension Socket with Switch
US$
6.40
-
6.60
1,000 Pieces
(MOQ)
1/4
Wenzhou Decoamigo Electric Co., Ltd.
3 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Decoamigo Hot Trending Conference Table Power Outlet with 3 UK Plugs Pd18W Overload Switch Surge Protection Clamp Desk Socket
US$
13.64
-
19.00
200 Pieces
(MOQ)
Decoamigo Conference Wireless Charge Panel European Standard German Plug Module Counter Top Pop up Smart Electrical Power Socket Lifting Outlet
US$
96.60
-
110.80
100 Pieces
(MOQ)
Commercial Grade Floor Box Socket with IP44 Protection When Fully Closed
US$
9.50
-
11.50
50 Pieces
(MOQ)
Decoamigo Pop-up Socket Featuring Overload Protection and Seamless Worktop Integration
US$
73.00
-
80.00
200 Pieces
(MOQ)
1/4
Wenzhou Sunny Electrical Co., Ltd.
5.0
Send Inquiry
Single Pole Plugs and Sockets with Child Protection for Home Appliance
US$
0.78
100 Pieces
(MOQ)
Klass British Standard Trusted Supplier Wall Power Point Light Switch Socket High Quality
US$
0.46
-
0.76
100 Pieces
(MOQ)
100PCS/Carton 86 Size 13A Socket with Child Protection for General-Purpose
US$
5.68
-
6.14
500 Pieces
(MOQ)
Two Gang Switch Socket Have Aesthetic Appearance with Child Protection
US$
0.89
-
5.34
100 Pieces
(MOQ)
1/4
Dongguan Maiyu Electronics Co., Ltd.
13 yrs
·
5.0
·
Manufacturer/Factory
Send Inquiry
Triple 3.1A Dual USB Port Charger Voltmeter 12V Socket Panel Mount Marine Power Waterproof Short Circuit Overheat Protection Outlet Plug Jack
US$
3.00
-
4.00
100 Pieces
(MOQ)
Dual USB Car Charger 12V Socket
US$
0.10
50 Pieces
(MOQ)
1 Cigarette Lighter Socket + 3.1A Dual USB Power Adapter Charger + LED Digital Voltmeter
US$
4.00
-
5.20
100 Pieces
(MOQ)
3 in 1 5V 3.1A Universal Dual USB Car Charger Digital LED Voltmeter Cigarette Lighter Socket
US$
3.00
-
4.00
50 Pieces
(MOQ)
1/4
YUEQING AIBEIKEN ELECTRIC CO., LTD.
12 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
3 Hole Waterproof Auto Base Protection Bracket Flame Retardant Marine Boat USB Charger Plug Socket Panel Mount
US$
1.25
-
1.70
50 Pieces
(MOQ)
High Quality Durable 12V Car Auto Cigarette Lighter Replacement Plug Socket
US$
2.60
100 Pieces
(MOQ)
12V Plug Car Marineoutlet Socket Cigarette Lighter Socket with LED and Dust Cover
US$
0.76
-
0.95
100 Pieces
(MOQ)
Universal Mini Vehicle Ship Refitting Multi-Function Panel 12V Car Cigarette Lighter Plug Multi Port USB Car Charger Socket
US$
5.60
-
5.80
2 Pieces
(MOQ)
1/4
Lanka Industrial Automation (Shanghai) Co., Ltd.
5.0
Send Inquiry
2500W Lighting Protection 8 Way IEC320 C13 Power Strip Surge Protector Electrical Plugs and Sockets
US$
10.00
-
20.00
1,000 Pieces
(MOQ)
10A PDU 4 Way Au Socket with Au Plug and Spiral Wire
US$
35.00
-
48.00
50 Pieces
(MOQ)
Desktop Tower Plug Universal Jack Bit Smart Socket USB British Standard Wiring Vertical Plug Customized
US$
2.80
-
5.68
500 Pieces
(MOQ)
Factory Price 6 Way Surge Protector Power Strip Extension Socket
US$
2.55
-
3.99
100 Pieces
(MOQ)
1/4
Yueqing Winston Electric Co., Ltd.
16 yrs
·
4.6
·
Trading Company
Send Inquiry
EU Us Dual Standard 16A Smart Plug Socket with Overload Surge Protection Energy Monitor Alexa Google Voice Control
US$
2.80
-
3.90
20 Pieces
(MOQ)
1switch 2 Socket Outdoor Waterproof Outlets Universal Standard Power Socket with Protection Cover IP66 Ik08
US$
30.13
-
40.18
10 Pieces
(MOQ)
Zigbee Smart Universal Plug Five-Port Socket with Low Power, Safety Protection, Remote Control & Tuya Compatible
US$
12.68
-
14.95
10 Pieces
(MOQ)
Tuya WiFi Plug Smart EU Socket 16A/20A - APP Remote & Timing, Overload Protection, Real-Time Power Monitor,
US$
4.60
-
5.99
10 Pieces
(MOQ)
1/4
Taeda Intelligent Technoloy Co.,Ltd
Send Inquiry
Regulatory 4-Port Extension Cord Socket: Insulated Sheath Plug + Overload Protection, Safe for Home & Office!
US$
2.50
-
5.00
500 Pieces
(MOQ)
Safe 4-Port Extension Cord: Regulatory Standard, Insulated Sheath Plug, Overload Protection—All in One!
US$
2.50
-
5.00
500 Pieces
(MOQ)
4-Port Extension Cord (regulatory) : Insulated Plug Prevents Shocks, Overload Protection Guards Devices
US$
2.50
-
5.00
500 Pieces
(MOQ)
3 Way 13A Power Strip Electrical Switch UK Power Socket with USB Ports for Home Appliance
US$
4.50
-
6.50
500 Pieces
(MOQ)
1/4
Shenzhen Miyan Network Technology Co., Ltd
4.9
Send Inquiry
Smart Plug 2500 W USB Wall Outlet Protection Switch Smart Power Socket
US$
5.20
-
5.80
10 Pieces
(MOQ)
Universal Wall Travel Adapter Charger Socket with USB and Type C Worldwide
US$
6.00
-
6.50
10 Pieces
(MOQ)
Travel Adapter 1875 W Universal World Plug Electrical Socket with USB Charging
US$
3.60
-
4.00
10 Pieces
(MOQ)
Travel Plug Adapter Multiple World Plug Foldable Universal Wall Socket
US$
5.30
-
6.00
10 Pieces
(MOQ)
1/4
Cixi Changfeng Electrical Appliance Co., Ltd
30 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Universal Extended Socket with USB
US$
4.60
-
4.80
200 pieces
(MOQ)
5 UK Standard Type Surge Protect Power Socket with Individual Switch for Sale in Sg/My/UK/HK
US$
4.60
-
4.80
200 pieces
(MOQ)
Multi-Purpose PP Material Wire Insert Board Color Socket with USB
US$
4.60
-
4.80
200 pieces
(MOQ)
Universal Extended Socket with USB and Unique on-off Switch Power Strip
US$
4.60
-
4.80
200 pieces
(MOQ)
1/4
1
51
Hot Products
China Plug
Protection Set
Protection Product
Electronic Protection
Protection Items
Control Protection
Power Protection
T Plug
Related Manufacturers & Supplier
N Plug Factories
Plug Product Factories
Plug Supply Factories
China Socket Factories
Plug Socket Manufacturers
D Plug Manufacturers
Electrical Protection Manufacturers
Industrial Socket Manufacturers