Radio transmitting circuit and coding technology is used to solve the problem of signal blocking. Various temperature modes can be adjusted, suitable for different scenarios It supports wireless transmission of data signals and remote monitoring of cell phones. The ultra-low power consumption gives it a long battery life. It is made of good quality ABS and PC material, very durable. With low voltage monitoring prompt function, it is very convenient for you to use. And it can send online reports to the host regularly. Anti-disassembly design in professional security field makes it very easy to install and disassemble. Split design and high reliability makes it very safe to use. Temperature and humidity sensors can be linked with other smart devices in your home to improve indoor cooling and heating, making your home more comfortable Low-advantage design to ensure long-term battery use. Built-in high-precision digital sensors, it offers fast and accurate detection of temperature and humidity changes Item Name: Humidity Sensor Material: ABS, PC Communication Method: WIFI 2.4G Working Temperature: -10 Degrees Celsius ~+55 Degrees Celsius, 0~100%RH Power Supply Mode: DC3 V (2Pcs AAA Batteries Required, Battery Not Included) APP: Smart Life/Tuya Smart, Needn't Gateway Required, Built-in Buzzer 55dB Size Details: Size: 6.5cm x 6.5cm x 4.8cm/2.56" x 2.56" x 1.89" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Temperature Humidity Sensor 1 x User Manual