our main products are gsm alarm,wireless alarm,mms gsm alarm,power alarm,IP camera,smoke detector,gas detector,child alarm,etc.. Product Description Features: ... detector is triggered, 9) alarm delay can be set from 0 to 255 seconds 10) inside 90dB siren 11) Back-up battery ... switch automatically. 12) long-distance operation by call: The alarm can be controlled by keypad, remote controller, and also by ...