The wireless smoke detectors or wireless smoke alarm systems are programmable between any number of zones from 1 to 999. The detectors are equipped with an in-built hooter and test button. So when ever detector becomes activated through smoke it sends radio waves to the panel. Panel display the same zone in which it has been programmed. Programmed zone can be changed to another zone if required. There is also an inbuilt hooter in the detectors as well as radio emitter. Each emitter is workable with call button ( manual call point ).Model no.: ss 168description: wireless optical smoke sensorcompatibility: all karsan analogue system through radio wavesmounting: plugs into surface basemonitoring: continuously self checkingindication: alarmdetection principle: photo electric light scatteroperating voltage: 9 volts dcbattery backup: 3 to 5 yearsaddressing method: unique address embedded in detectorenvironmental application: indoor usetemp range: 10oc to 70ochumidity range: 20% to 95% rh (non condensing)construction material: moulded absdimensions: 106mm (dia) x 36mm (h)colour: whitesend us enquiry