CODASH Solar TPMS Car Tire Preure Alarm Monitor System LCD Display Intelligent Temperature Warning With 4 External Sensor Specifications.Preure unitBARTemperature unit: Operating frequency: 433.92MHZOperating voltage: 3.0-4.2VOperating current 3MAUSB charging current 250MAWorking environment: -20~70CStorage temperature: -40C~85CSleeping current100UACharging method: Solar/USB cableMonitoring temperature range: -40C~+90CMonitoring air preure range: 0~4BARFeatures.1, solar charging, no need to connect the car cigarette lighter charging2, real-time monitoring of the preure and temperature of the four tires3, low air preure/high temperature alarm4, high temperature/leakage/low battery alarm5, intelligent anti-shock start when the car is running, no need to switch on and off