X-Sense Smoke Detector, Wireless Interconnected Smoke Alarm with 10-Year Battery Life and Transmission Range of Over 820 ft, SD20-W, Pack of 1 Aolyty After-sales service: Online video support

After-sales service: Online video support

make it more stable

small items stay neat and within reach

App + Fingerprint + Code + Mechanical Key

helping prevent tripping hazards

X-Sense Smoke Detector, Wireless Interconnected Smoke Alarm with 10-Year Battery Life and Transmission Range of Over 820 ft, SD20-W, Pack of 1 Aolyty After-sales service: Online video supportAbout this item 10 Year Lifespan: This smoke detector offers 10 years of continuous protection in a compact design; the built in 10 year lithium battery will not need to be replaced for the life of the alarm Wireless Connection: Up to 24 X Sense Link+ wireless alarms, including smoke alarms, carbon monoxide alarms, and combination alarms, can be linked via RF technology, creating a wireless safety network that covers your whole house Flexible Network: