Cordless Telephone GSM Bug, Tri-band

Specification:

GSM tri band GSM network to make & instant surveillance task possible. No range limitation
For home phone line security, monitoring all outgoing and incoming phone conversation.
Auto switch between phone line and area voice monitoring. Phone line is first detected.
Auto calling when detect phone line in used, can turn on or off.
Built in high sensitive dual microphone.
Auto calling when detect voice level in this device, can turn on or off.
Auto calling when detect external device input, like infra red sensor alarm, can turn on or off.
Auto calling when detect external device input, like infra red sensor alarm, can turn on or off
Auto calling when detect shock for this device, can turn on or off.
Dual mode function, can operate independent without phone line plug in, auto detect function, Auto switch to phone line monitoring
function.
External microphone input can be used as voice unlimited repeater, transmit using GSM network.
SMS control function
One touch button operate system