●【NOTES】 A Tuya ZigBee Hub is required and sold separately(search B09LM644XJ or B091BRGMTZ on AMZ). ●【Real-time Door Open Detection】 Whenever the door/window opens unexpectedly, the MOES Door and Window Sensor will send an alert notification to your phone and activate the local alarm on the MOES Hub. ●【Home Automation】 The MOES Door and Window Sensor can control other Tuya ZigBee connected devices as the status of the door or window changes. ●【Voice Control】 Compatible with Smart Life Tuya App, Alexa and Google Assistant for a hands-free experience. ●【Easy Installation】 Easy installation with double-side tape. Low power technology and low battery reminder. Battery type: CR2032 (include), Product size: main part 25.2x40.2x12.4mm, magnet part: 26.0×10.0x9.0mm. In addition, If you have any questions, please feel free to contact us.