# 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
# Auto calling when detect external device input, like infra red sensor alarm
# Auto calling when detect shock
# 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

- cordles phone/mini wiretapping
- warranty