FEATURES:
Built-in rechargeable lithium ion battery
Charged via USB
High fidelity speaker for clear pure sounds
Loud volume & the Mini Speaker
Closes for easy mobility.

SPECIFICATION:
Power output: 2 W
Speaker: Dia (36mm)
Dimensions: D(52mm) x H (35--64mm)
SNR>=89dB
Runtime: 6 hours (medium volume), 4 hours (loud volume)
Net weight: 50g
Lithium ion battery volt: 3.7V
Lithium ion battery input: 5V
Charge voltage: 4.2V
Battery Capacity: 300mAH
Operating temperature: 0 C-40 C
Charge time: 2.5 hours (DC 5V), 4 hours (USB)
Battery lifecycles: 300-500 times