THIRDREALITY Zigbee Door/Window Sensor, 10 Pack, ZigBee Hub Required, No Battery Included

[Two Different Ways To Install] Simply remove the protective layer of double-sided tape and adhere sensor in your desired installation area; you also can use the screws to install it. Door sensor can only be applied indoors.

[Routine Triggers] Multiple ways to use with Alexa routines. When door or window is open, turn on a light, send an alert to your phone, let Alexa make a voice alarm or make a joke, etc.

[Upgraded Third Reality APP and Skill Functions] Connected with Third Reality Hub/Speaker, you can check the battery level in the APP, then replace the batteries in time; history record is also available to users. Enabled Third Reality Skill in the Alexa APP, you will have a low battery warning by emails.

[Work With Echo or Devices With ZigBee Hub] Works with Echo devices with built-in Zigbee hub, including Echo (4th Gen), Echo Plus (1st Gen and 2nd Gen), Echo Show 10 (2nd Gen and 3rd Gen) and Echo Studio. Also works with Eero 6, Eero 6 Pro, Smart things 2015/2018, Wink v2, Third Reality Hub, Third Reality Speaker with build-in Hub.

[Suit For Mostly Doors and Windows of The House and 2-year Long Battery Life] Door Sensor uses two AAA 1.5V Alkaline batteries for power and the batteries are easy to replace. At 20 triggers a day, the batteries last for 2 years. Note: Indoor use only and do not install the Door Sensor on metal door or window.