The Ranger RF Smoke Alarm is powered by a non-replaceable 10-year rated lithium battery.
The alarm is fitted with a test/hush/silence button to facilitate testing of the alarm. The silence function also allows the alarm and alarm system to be silenced in the case of a false alarm.
This alarm can be used as a stand-alone alarm or can be connected with up to 40 alarms.
FEATURES
Model Number: EP-RANG-RF-10
10-year 3V lithium battery
RF interconnectable with up to 40 alarms on one wireless network
Indicator lights for test/hush/silenceand fault warnings
Loud alarm – 85dB(A) @ 3m
CSIRO ActivFire listed
Meets Australian smoke alarm standards (AS3786:2014)
7 year warranty
The RF (interconnecting) one is $64.90 on that website?