Aqara Door/Window Sensor is a Zigbee contact sensor with a CR1632 coin cell and adhesive mount; it uses a magnet-operated reed/spring contact and integrates with the Aqara/Mi Home ecosystem and Alexa/Google/HomeKit via an Aqara hub. For a budget smart-home sensor it offers reliable wireless Zigbee connectivity and easy hub setup, and is a strong buy at typical AliExpress bargain prices.
Buyers wanting a compact Zigbee door/window sensor that integrates into Aqara/Mi Home and voice assistants; avoid if you need battery standardization or hubless Wi‑Fi operation.
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