FireAngel 10 Year Optical Smoke Alarm featuring optical sensing technology. The FA6620 is the ideal detector for slow burning fires, where there is thick white smoke. This smoke alarm is perfect for placing in a bedroom, living room, dining room, landing or hallway. Features: 10 year optical smoke alarm 10 year battery included Less fuss, no need to change the batteries Optical Smoke Sensing Technology reduces nuisance cooking alarms Large central test and silence button Sleep Easy - silence the low battery chirp for 8 hours Easy Installation - fixings supplied Quiet test function supports discreet testing at a lower volume when compared to standard alarms Specifications: Dimensions: H:11.8 x W:11.8 x D:3.2 cm Colour: White Guarantee:5 years Model Number: FA6620-R