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
Wireless Interlinked Smoke, Heat and CO Alarm with Longlife Battery Kit - Firehawk W Series - £186.79 inc VAT
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
Cavius CV2208 Optical Smoke Alarm Mains Powered With RF Interconnection, Wireless Functionality & 10 Year Rechargeable Lithium Battery Back up 240V - Shop4 Electrical