Expand Your Smart Home Your Way: The XH02-M is an accessory that connects to the SBS50 base station (not included); simply press the test/silence button to connect the XH02-M to the base station and add up to 50 devices for full home protection Class A1 Heat Alarm for Fast Fire Detection: This heat alarm is equipped with an ultra-sensitive NTC thermistor that accurately detects a sudden rise in temperature or static temperatures between 129°F (54°C) and 149°F (65°C); it is not triggered by smoke, dust or cooking fumes, saving you from the nuisance of constantly having to turn off alarms Cost-Free Push Notifications: Monitor your home from anywhere and receive real-time push notifications for alarms, low battery, fault, and more via the X-Sense Home Security app; you’ll also be notified when the danger has passed Device Sharing Feature: Using the X-Sense Home Security app, you can share the home safety devices with your family members so that the shared users can check history, receive push notifications, and silence devices 7-Year Battery: In addition to being tamper-proof, this alarm’s built-in 7-year sealed battery has a low power consumption, saving you the trouble of having to regularly change the battery; your home will be protected 24/7 with the X-Sense heat alarm, even in case of a power outage Test/Silence via the App: Simply tap the Device Test or Silence button in the app to test the device or mute any unwanted alarms; it can also be operated by the X-Sense remote control (sold separately) without the need for a ladder to actually press the button on the unit, Weight: 0.2976240537 Pounds, Manufacturer: X-Sense