Passport Defender operation is completely automatic, using Audio and LED indicators toannounce the presence of a metallic object. Also is has 15 level detection indicator signal lights, showing the size of the metallicobjects from green to yellow to red colours, and more detail by numberof lights.

Passport Defender SPECIFICATIONS
Circuit: Automatic self-tuning transmitter-receiver that never requires adjustments.
Operating frequency: 95 KHz
Audio frequency: 2000 Hz warble stone.
Voltage: 6.8 to 10 Volt DC
Current: 12mA typical
Battery requirement: 9 Volt standard or Alkaline battery.
Level detection light: 3 sections 15 number indicate light green-yellow-red.
9-Volt rechargeable unit: Available (optional)
Length x Width: 420 x 83mm
Weight: 480 grams
Automatic re-tuning and battery check
Operationis completely automatic, using Audio and LED indicators to announce thepresence of a metallic object. Also is has 15 level detection indicatorsignal lights, showing the size of the metallic objects from green toyellow to red colours, and more detail by number of lights.
Passport Defender detects all conductive metals including ferrous, non-ferrous and stainless steel.
Passport Defender operates in a very low frequency range and is therefore completely safefor both operators and subjects in all scanning operations, even wheninvolving pregnancies or medical electronic devices such as heartpacemakers.

Other information
Circuit: Automatic self-tuning transmitter-receiver that never requires adjustments.
Operating frequency: 95 KHz
Audio frequency: 2000 Hz warble stone.
Voltage: 6.8 to 10 Volt DC
Current: 12mA typical
Battery requirement: 9 Volt standard or Alkaline battery.
Level detection light: 3 sections 15 number indicate light green-yellow-red.
9-Volt rechargeable unit: Available (optional)
Length x Width: 420 x 83mm
Weight: 480 grams
Automatic re-tuning and battery check