The Yandex YNDX-00520 is a compact sensor designed by Aqara to monitor the opening and closing of doors and windows. It operates on the Zigbee 3.0 protocol, ensuring a stable connection within your smart home ecosystem. The device is powered by a CR1632 3V battery, which provides a long service life of up to two years before needing a replacement. Measuring just 11 x 22 x 41 mm and weighing 15 g, this white sensor blends discreetly into any interior. It can detect a gap of up to 22 mm, and an integrated LED indicator helps you keep track of its status. The unit is built to function in temperatures ranging from -10 °C to +50 °C, making it versatile for different rooms. You can easily set it up using the included mounting stickers and manage it through an Android or iOS device.