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 & HW1-R Heat Alarm, White

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: Thermistor heat sensor - esigned to detect rate of increase in temperature

Product 2: Mains powered with replaceable 9 V battery back-up

Product 2: Interconnect up to 50 alarms with the RF interlink base rf-burg-wachter-t or hardwire interconnect up to 12 SW1, Hw1 or CW1 alarms

Product 2: Class A2 heat detection provides advanced class A2 detection (54 - 70°C)