[WIRELESS] The outdoor temperature sensor with built-in wireless technology can transmit up to 60 meters in open areas. Long-range wireless transmission allows for flexible installation and reliable operation. [WATERPROOF] The outdoor temperature sensor features a waterproof design, making it suitable for various outdoor environments. [COMPACT] The sensor is compact and lightweight, requiring minimal installation space. [TWO WAYS TO INSTALL] Designed with a mounting bracket and hanging hole on the back, the sensor can be easily mounted on a wall or placed on a flat surface. Powered by batteries, it offers cord-free convenience for easy setup. [APPLICABLE SCENE] Operating at a frequency of 433.92 MHz, this outdoor temperature sensor is compatible with Fanju weather stations. Each station can connect to up to three outdoor sensors.