Fireangel FireAngel FA3313-T2 Replaceable Battery Detector Twin Pack Carbon Monoxide Alarm & FireAngel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615-R (ST-625 replacement, new gen)

Product 1: Advanced electrochemical sensors detects dangerous levels of Carbon Monoxide ( CO ) in your home and alerts you with a clear, loud alarm

Product 1: As well as being calibrated and rigorously tested in-house the alarms have been third party approved through the British Standards Institute (BSI) and are Kitemark certified

Product 1: The units have been designed to either be wall mounted or left portable so you can take them on holiday for protection on the go. They're also suitable for caravans, motor caravans and boats

Product 1: Each device is supplied with 2 x AA batteries, which can be replaced as required when the alarms provide the low battery warning sound

Product 2: The perfect replacement for FireAngel ST-625 model with a simple swap of the baseplates, or for ST-622, ST-620 and ST-750 models using the existing baseplate

Product 2: With optical sensing technology smoke is rapidly detected as it enters the alarm chamber, for a quick reaction to slow burning fires

Product 2: The alarm is supplied with 2 x AA batteries which can be replaced upon hearing the low battery warning, it is recommended you replace the alarm after 10 years

Product 2: Featuring a quiet test function which means you're less likely to wake up loved ones or disturb the neighbours when testing your alarms