First Alert Ionisation Smoke Alarm Twin Pack
- Sensitive ionisation smoke sensor is quick to detect fast flaming fires
- Hush and test button quickly silences nuisance alarms
- Loud 85 dB alarm is designed to be heard easily
- Provides a low battery warning chirp to indicate when the battery needs replacing
- Powered by included 9 V battery; measures 104 mm (D) 35 mm (H)
