Feature: 1. 【Reliable Home Security System】: The TY 2.4G WIFI Door Window Sensor is a must-have for your home security needs. This smart sensor is compatible with Alexa and Google Assistant, allowing you to seamlessly integrate it into your existing smart home system. 2. 【Enhanced Safety Features】: Powered by two AAA batteries (battery not included), this sensor has a standby current of less than 35uA and an alarm current of less than 100mA. With a volume range of 4, including a mute option, it outputs a sound level of 90dBA at a distance of 1 meter, providing you with accurate and effective alerts. 3. 【Seamless Connectivity】: Equipped with 2.4GHz Wi-Fi IEEE802.11b/g/n, this sensor ensures stable and fast connection to your home network. Enjoy real-time monitoring and receive instant notifications on your smartphone when unexpected activity is detected. It also allows for door/window status and record queries, giving you complete control over your home's security. 4. 【Long-lasting Performance】: The low battery indicator will remind you when the battery voltage drops to 2.4V, ensuring that you never miss any important security updates. Designed with high energy efficiency, this sensor provides long-lasting performance without the need for frequent battery replacements. 5. 【Sturdy and Versatile】: Built to withstand various environmental conditions, this sensor operates within a wide temperature range of -10°C to 55°C. Suitable for protecting doors, windows, cabinets, and more, it offers reliable security for your home or office. Specification: Power Supply: DC 3V, using 2 * AAA batteries (battery not included) Standby Current: