The new Synergy+ Smoke Detector is one of the new auto detection units by Evacuator Alarms. The device uses the built in smoke detector to automatically detect smoke and trigger any linked devices. The device also features three easy to use buttons for manual testing and easy pairing modes. The smoke detector head can be swapped out for compatible Synergy+ heat detector heads making it easy to meet requirements. Please Note, this product is for indoor use only. Optical Smoke Detector Up to 3 years Battery Life Category One radio module CE, UKCA, ROHS & EMC Compliant Battery Low indication Secure Reset Function Status LED Totally wire free operation Mesh Radio connectivity Radio Frequency 869Mhz 2Km line of sight range Please note, this device does not emit any sound ADDITIONAL INFORMATION Weight 1.6 kg Dimensions H 165 x W 165 D 148mm IP Rating Indoor Only Power Source FMCEVAWBPACK4 Product Code FMCEVASYNP4 Weight 1.6Kg