Wireless Interlinked Smoke and Heat Alarm with 10 Year Battery Life, EN14604, CE Certified, Interconnected Fire Alarm, Low-Battery Alert.3 Pack : Amazon.co.uk: DIY & Tools
Aico Ei3016 Interlinked Optical Smoke Detector | The Safety Centre, UK
X-Sense Wireless Interlinked Smoke Alarm, Mini Smoke Alarm for Home, 820 ft Transmission Range, Replaceable Battery-Operated Interconnected Fire Alarm, EN 14604, XS01-WR (RF Interconnected), 3-Pack : Amazon.co.uk: DIY & Tools
Wireless Interlinked Smoke and Heat Alarm with 10 Year Battery Life, EN14604, CE Certified, Interconnected Fire Alarm, Low-Battery Alert.3 Pack : Amazon.co.uk: DIY & Tools
Hardwire interconnecting multiple smoke and heat alarms | FireAngel