Fireangel FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack, White & ST-750T Thermoptek Smoke Alarm

Product 1: The perfect replacement for FireAngel ST-622, ST-620 and ST-750 models, these alarms will fit on to the existing baseplates, or can be installed easily using the supplied bases and 2 screws

Product 1: With optical sensing technology smoke is rapidly detected as it enters the alarm chamber, for a quick reaction to slow burning fires

Product 1: The alarms come with sealed, tamper proof batteries that will last the lifetime of the alarms. It is recommended that smoke alarms are replaced every 10 years

Product 1: Featuring a quiet test function which means you're less likely to wake up loved ones or disturb the neighbours when testing your alarms

Product 2: Thermoptek multi-sensor rapidly detects fast flaming and slow smouldering fires

Product 2: Smart silence - silence your smoke alarm by momentarily pressing the test button, ideal for nuisance alarms

Product 2: Toast proof - less prone to nuisance alarms from cooking fumes

Product 2: Designed to meet the specifications of the UK's fire and rescue service