The main function:1. Tire preure and tire temperature are displayed at the same time2. Alarm for abnormal tire preure and temperature,Alarm when tire preure is higher than 3.2 bar (default value)Alarm when tire preure is lower than 1.8 bar (default value)Alarm when tire temperature is higher than 68 (default value)The default value can be adjusted according to actual needs''3. 4 alarm methods: high/low preure alarm, high temperature alarm and sensor low preure alarm.5.Working voltage: DC 5V6.Preure unit: bar / psi7.Temperature unit: / 8.Working temperature: -20 - 859.Storage temperature: -40 - 10510.Waterproof level: IP67External sensor parameters.Transmitting frequency: 433.92MHzPreure range: 0 3.5 bar / 0 3.5 barDefault low preure alarm value: 1.8 barDefault high preure alarm value: 3.2 barPreure accuracy: 0.1 bar / 1barWorking voltage: DC+2.0 3.6VWaterproof level: IP67Battery: Built-in CR1632 button battery (the battery can be removed and replaced by yourself)Battery life: 1.5-2 years typical value.Package Contents:Receiver*1,Sensor*2,Anti-theft nut*2,Wrench *1Type A Type B Type C Q & A Q: Why doesn't the rear wheel of the sensor read data? Answer: After replacing the sensor battery, please check the paired sensor When pairing the sensors, you need to reinstall the front and rear wheel sensors at the same time