9V battery operated Smoke alarm  Best price

Technical figures:

power source: 9V DC battery

operating crurrent:10μA (normal) and 20-50 mA(alarm working)

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

Temperature range: -10°c to +50°c

battery life:1 year min

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 indicator

•low battery signal

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

•photoelectric chamber for early detection from all directions

•built-in sounder: 85dB at 3m 

•Check performance at least monthly