Technical figures:

--power source:9V DC battery

--sensitivity to smoke:zin comply with UL 217 & BS5446; Part 1 2000

--Temperature range: -10°c to +50°c

--battery life:1 year minimum

--humidity range:5%-95% relative humidity(RH)

--Size:110*25mm 

NO/NC output,wireless option

Features:

•ceiling or wall mounting

•easy to install with mounting hardware included

•flash alarm inidcator(Red)

•test button for easy monthly testing

•low battery signal

•safety clip feature,not allow mounting of smoke alarm without battery installed

•photoelectric chamber for early detection from all diretions

•built-in sounder: 85dB at 3m