X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector with LCD Display & 10-Year Battery, Over 820 ft Transmission Range, 1-PackBrand: X Sense Color: White Features: Please Note: SC07 W supports wireless interconnection but does not have Wi Fi; if you need Wi Fi, please search for SC07 WX Hear an Alarm from Anywhere: If one alarm detects smoke or dangerous CO levels, all wireless interconnected units will activate, ensuring the earliest possible warning Wide Coverage for Full Home Protection: Up to 24 X Sense Link+ devices can be interconnected to create a wireless safety