X-Sense Smoke and Carbon Monoxide Detector Combo, Wireless Interconnected Combination Smoke and Carbon Monoxide Detector with 10-Year Battery, Up to 24 X-Sense Link+ Wireless Alarms, SC01-W, 3-PackBrand: X Sense Color: White Features: Please Note: SC01 W supports wireless interconnection but does not have Wi Fi Full Home Protection: Up to 24 Link+ smoke alarms, CO alarms, and combination alarms can be interlinked for maximum coverage Wireless Interconnection: If one alarm detects a threat, all interconnected alarms will activate to sound a warning 10 Year Sealed Battery: Contains a long life lithium battery that powers the device for its entire