... off GSM alarm kit EB-832( 7wired and 28 wireless zones) 1.1 SpecificationOperating Voltage : DC9-12V Operating ... supply for wired detectors.12. It can be connected to other sensors, such as PIR sensor, smoke sensor, emergency button ... sensor: 1 pcRemote controller: 2pcsExternal Siren: 1pcOptional: backup battery, wireless smoke detector, gas detector, infrared curtain sensor, panic button, etc. ...