Car TPMS Cigarette Lighter Wirele TPMS Digital tpms Tire Preure Alarm System 4 External Internal Sensor Universal This link have two style can choose: rotatable and non-rotatable Option 1External Rotatable Function - 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: ABS Receiving frequency: 433.92MHZ0.02MHZ Working temperature: -20~85 Charging: cigarette lighter Sleep current: 100MA Working current15MA Working voltage: 5V Number of sensors: 4PCS (external) Sensor battery model: CR1632 Preure range: 0-3.5BAR Option 2External Non-rotatable