This alarm is designed to detect tiny smoke particles this alarm is powered by a sealed, long-life lithium battery for ten years, which is the intended life of the alarm.

• 10 year lithium battery
• Maintenance free
• BSI Kitemarked to BS 5446 (Pt 1)
• CE Marked
• Test and hush buttons with auto reset
• Dimensions: diameter 142mm x depth 40mm
• 5 year warranty