1、Radio transmitting circuit and coding technology to solve the problem of signal interference blocking. 2、Various temperature modes can be adjusted, suitable for different scenarios 3、Wireless transmission of data signals, mobile phone remote monitoring. 4、Ultra‑low power consumption and long battery life, avoiding frequent battery replacements. 5、With low voltage monitoring prompt function. Send online reports to the host regularly. 6、Anti‑disassembly design in professional security field. Split design, high reliability. 1 x Temperature Humidity Sensor(Battery Not Included)1 x English Manual1 x Screw Item Type: Temperature Humidity SensorMaterial: PCColor: As shown in the pictureProduct Size: Approx. 6.6x 6.4x3cm / 2.6x 2.5x 1.2in Weight: Approx.88g/ 3.1ozModel: MIR-TE200Type: Temperature detection alarmAlarm Current: ≤3 0 m ABattery: 4.5V, 3 x AA batteries (Not included)Communication Method: WIFI 2.4GWorking Temperature: -10~+55℃ 0~100%RHNetwork Setting Instructions: 1. Press the button for 5-10 seconds, when the signal icon flashes, release the network setting button. The network setting lasts for 60 seconds, and the signal icon keeps flashing. If pressed for more than 10 seconds, the network settings will be cancelled. 2. If successful, the signal icon opens; otherwise, the signal icon disappears and the setting is cancelled.Installation Notes: 1. Fix a screw on the wall and align the screw hole of the device with the screw. 2. Place the sensor in a suitable location.