The main function: 1. Tire pressure and tire temperature are displayed at the same time 2. Alarm for abnormal tire pressure and temperature, Alarm when tire pressure is higher than 3.2 bar (default value) Alarm when tire pressure 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 pressure alarm, high temperature alarm and sensor low pressure alarm. 5.Working voltage: DC 5V 6.Pressure unit: bar / psi 7.Temperature unit: / 8.Working temperature: -20 - 85 9.Storage temperature: -40 - 105 10.Waterproof level: IP67 External sensor parameters. Transmitting frequency: 433.92MHz Pressure range: 0 3.5 bar / 0 3.5 bar Default low pressure alarm value: 1.8 bar Default high pressure alarm value: 3.2 bar Pressure accuracy: 0.1 bar / 1bar Working voltage: DC+2.0 3.6V Waterproof level: IP67 Battery: 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 *1