The Shelly BLU Door/Window Sensor is a highly efficient Bluetooth-operated device that enhances your home security by monitoring the status of doors and windows. Whenever a door or window is opened or closed, the sensor sends instant notifications to your smartphone, ensuring you're always aware of any activity. With an impressive battery life of up to 5 years, it offers long-lasting performance with minimal maintenance. The sensor integrates effortlessly into the Shelly smart ecosystem, enabling automation of various home scenarios. For example, you can set the sensor to trigger lights, alarms, or HVAC systems when a door or window is opened. This not only boosts security but also adds convenience to your daily routines. Compact and easy to install, the Shelly BLU Door/Window Sensor is perfect for safeguarding your home or office. It's ideal for use on entry points, including doors, windows andeven cabinets, ensuring that you're always in control of your environment. With real-time alerts and seamless integration with other Shelly devices, this sensor offers a reliable and user-friendly solution to enhance your smart home security.