REMOTE CONTROL You can control this burglar alarm system Arm/Disarm/Voice Monitoring /Intercom by cellphone anywhere(Need a T-mobile SIM card). BUILT-IN BATTERY This system work well when someone cut wires or power off. You don't worry other people intrude your house when power off.
CELLPHONE FUNCTION This main unit can make the phones like a cellphone. (Work with T-Mobile Card, SIM card isn't including in the package).