The Lifesaver LIF10YPEW uses photoelectric technology and is powered by a non-replaceable sealed 10 year lithium battery. This smoke alarm has a built in RF wireless interlink control and can interconnect up to 24 units. When one RF interlinked unit sounds an alarm, all other units in the same RF interlink network will alarm.

Features: 

- Wireless RF interlink technology.
- Photoelectric sensing technology.
- Non replaceable lithium battery operated.
 -One button Test and Hush feature.
- Tamper resistant feature.
- Dual insect screens over to reduce nuisance alarm.
- Operates as single unit or interconnect up to 24 units wirelessly.