specification:

Security detecting: Prevent taking contraband, such as: knife, gun and so on.
Factory: Prevent the loss of valued objects.
Education area: Prevent taking cheat-tool,such as: telephone, electronic dictionary, and so on.

Parameters

• Alarm Termssound (vibration) and light alarm simultaneously

• Alarm sound≥75dB(A)

• Operating Current<50mA

• Operating Voltage7V-9V

• Operation Frequency22KHz

• Water-proof GradeIP31