Aqara E1 Zigbee Door and Window Sensor

The Aqara E1 Zigbee Door and Window Sensor is a compact, battery-efficient contact sensor that excels within the Aqara ecosystem. It's significantly smaller than competitors due to its use of the tiny CR1632 coin cell, making it easy to conceal on doors and windows. While the thesmarthomehookup.com review tested Aqara sensors generally and praised their size and battery efficiency, the sensor requires Aqara hub integration for smart home platform support. Good budget-tier option for Aqara/HomeKit users.