Manufactured by the most advanced SMT technology.Quartz locked system and FM Modulation.Wide acceptance for household, stores, and officesWireless installation by D.I.Y design.Independent 8
security zones (unlimited extend)Built - in 12V DC back up battery in main receiver. The transmitter has low battery indicator which also display on main receiver.Each transmitter can connect with
three sensors.No monthly monitoring fee requested.Option accessory: automatic phone dialer, PIR sensor, heat/gas detector, video monitor, camera, and VCR, etc..The main module is capable for UPS
function