Mains-powered optical smoke alarm with rechargeable sealed-in lithium back-up battery, that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat. Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.

• Slide-on QuickFit base aligns with common backbox spacing to reduce redrilling
• Flared base plate helps cover fixing marks from previous alarms for a cleaner finish
• Interlinks with up to 23 other Kidde FIREX alarms (smoke, heat and CO) – all sound when danger is detected
• Integrated cable management keeps wiring secure and organised across multi-unit housing jobs
• Alarm memory identifies the source unit – find the source instantly across any interconnected system
• Dust compensation and bug screen reduces nuisance alarms
• Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
• Auto reset after activation
• Mains operation with rechargeable sealed-in lithium backup battery
• 10-year manufacturer’s warranty
• Kidde Product Code: KF21