X-Sense Mini Smoke Alarm, 10-Year Battery Fire Alarm Smoke Detector with LED Indicator & Silence Button, XS01Brand: X Sense Color: White Features: Please Note: XS01 is a basic standalone unit; it does not support wireless interconnection, does not have Wi Fi, and cannot be used with a base station; for interconnection, search for XS01 WR. For Wi Fi functionality, look for XS01 WX or XS01 MR 10 Year Battery: Forget about battery changes as this alarm is equipped with a built in lithium battery that lasts for 10 years Accurate with Fewer False Alarms: Reliably