Ceiling or wall mounting Loud 85dB sound
Easy to install with mounting hardware included
9VDC battery
Suitable for any room
Flash alarm indicator (red)
Test button for easy recommended monthly testing
Low battery signal
photoelectric  chamber for early detection from all direction

Power supply: 9V Carbon Zinc batteries or Alkaline batteries.
Static current: ≤20uA.
Alarm current: ≤15mA.
Sensitivity:    grade.
Alarm sensitivity: ≥ 85dB.
Battery life: at least 1 year.
Work temperature: -10℃  ~ 50℃.
Work humidity: ≤95%RH.
Certificate: EN14604 & CE