X-Sense Wi-Fi Smoke and Carbon Monoxide Alarm with Replaceable Battery, Smart Smoke and CO Alarm for Home Compatible with X-Sense Home Security App, SC07-WX, 2-Pack : Amazon.co.uk: DIY & Tools
X-Sense Smart Carbon Monoxide Detector with 5 Year Replaceable Battery XC01-M | DIY at B&Q
Netatmo Smart Carbon Monoxide Alarm
1 x Smoke Detector Wireless SMART (RF & WiFi) - 10 Year Battery CE EN14604 UK, Scottish and Wales Fire Regulation