Power : 9V(6F22)
Operate Frequency : 22KHz
Operate Current : < 50mA
Sensitivity : 30mm at hat pin
Sensitivity : 50mm at USD 25 cent

Power Supply : 9VDC-6pcs AA
Power Supply :size1.5V Batteries
Operating Frequency : 22KHz ±
Operating Frequency : 2.2KHz
Sensitivity : 10cm for a US
Sensitivity : (25cent)quarter with
Sensitivity : meter
Sensitivity : Indication at min,
Sensitivity : discrimination

Battery : 2*9V
Operating frequency : 5.5KHz
Sensitivity : Min.23cm(Test Coin
Sensitivity : US25 cent)

Power Supply : B1: 18VDC-2pcs
Power Supply : 9V Batteries in
Power Supply : series
Power Supply : B2;9V Battery
Operating frequency : 15KHz ±
Operating frequency : 2.2KHz
Sensitivity : 16cm for a US
Sensitivity : (25cent)

Power Supply : 8pcs 1.5V Batteries in Series
Emitting Frequency : 6.99KHz
Signal Frequency : 437KHz
Sensitivity : 25-30cm for a US
Sensitivity : (25cent)

Power Supply : 8pcs 1.5V Batteries in Series
Emitting Frequency : 6.99KHz
Signal Frequency : 437KHz
Sensitivity : 35cm for a US
Sensitivity : (25cent)

Power Supply : 8pcs 1.5V Batteries in Series
Emitting Frequency : 6.99KHz
Signal Frequency : 437KHz
Sensitivity : 25-30cm for a US
Sensitivity : (25cent)