Detailed introduction to GSM Home Alarm (AYD-2000G4):

GSM 900/1800 band alarm base
Voice and message alert
Monitor living surroundings
Set alarm on/off by controllor
Call in set alarm onoffmonitoroutput
5 group phone + room number
Programable 4 group text message
3 district for wire director
10 district for coreless director
1 relat output to power on camera when alarm
3 output for lampcookerair condition