Features:Real time Monitor tire preure can improve fuel efficiency, prolong tire life, increase traffic safety and monitor temperature.Visual and sound warningLCD displays tire preure and temperatureWirele connect by sensors, easy installSolar charging,don't need to connect car cigarette lighter to chargeUSB charging available,no worried when rainy day or night time.Specifications:Color: BlackSensor IP: IP67Display Units: Bar, PsiSize: as the picturesMaterial: Plastic, metalWorking Frequency: 433.92MHzSensor Working Temp.: -40~125 CReceiver Working Temp.: -20 ~ 70CWorking Preure: 0~51 Psi/0~ 3.5 BarReceiver charging method: USB, Solar energyWorking Voltage: Sensor: 2.0-3.6V; Receiver: 5VSensor Battery: Built-in CR2050 button batteryReceiver Battery: Built-in 400m Ah polymer lithium batteryTips:The host (TPMS) must be turned on before installing the sensor (