Car TPMS Cigarette Lighter Wirele TPMS Digital tpms Tire Preure Alarm System 4 External Internal Sensor UniversalOption 1:External RotatableFunction- Real-time monitoring of tire preure and temperature- Tire leak warning and temperature balancing- The display can be plugged directly into the cigarette lighter- Buzzer alarm and display alarm value- Can support four tires, the tire positions can be interchanged- Visual and audible warning of abnormal preure and temperature- The receiver can adjust the angle according to actual needs.Specification:Material: ABSReceiving frequency: 433.92MHZ0.02MHZWorking temperature: -20~85Charging: cigarette lighterSleep current: 100MAWorking current15MAWorking voltage: 5VNumber of sensors: 4PCS (external)Sensor battery model: CR1632Preure range: 0-3.5BAR Option 2:External OrdinaryNOTE: Non-rotatable