Tuya WiFi Door Window Entry Sensor Contact Sensor Open Closed Detector Smart Home Alarm Security Protection Work

Sensors can detect door and window activity to make your home safer.
It can also detect pet access to prevent your pets from getting lost.
Description
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Product parameters:
? APP name: Tuya Smart or Smart Life
? Work with Amazon Alexa/Google Assistance
? Battery type: DC3V, AAA1.5V*2 (not include in shipment)
? Low-battery remind function
? WIFI: 802.11b/g/n, 2.4G
? Door two way function (Detect open/close status of the door/window)
? Support all Tuya smart product Linkage control
? Working distance: ?15mm
? Low power undervoltage: ?2.4V