X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Value Memory, XC01-WR - Walmart.com
X-Sense Wireless Interconnected Smoke Detector with over 820 ft Transmission Range, XS01-WR Link+ - Walmart.com
XS01-WR Wireless Interconnected Smoke Alarm
X-Sense XS01-WR Mini Wireless Interconnected Smoke Detector-3 PACK
X-Sense Wireless Interconnected Battery Powered Smoke Detector Fire Alarm with Over 820 ft Transmission Range, SD19-W, Pack of 6 - Amazon.com
X-Sense Wireless Interconnected Smoke Detector Battery Powered Fire Alarm with Over 820 feet Transmission Range, XS01-WR Link+, 6-Pack - Amazon.com