Real-Time Warnings: When the air pressure or temperature of any tire goes outside the predetermined range, both the monitor display and an audio alarm will warn you. You're also warned when the battery of a tire sensor is low. 2 Charging Ways: Support USB cable charging and solar charging. It does not occupy the car lighter socket, the tire pressure monitoring system will work continuously. 6 Alarm Modes: Fast leak alarm, slow leak alarm, high-pressure alarm high-temperature alarm, sensor fault alarm, and sensor low battery alarm. Easy Installation: Self-Install in 10 minutes: 1. Unscrew the valve dustproof cap then screw on the hexagonal nut; 2. Screw on the sensor; 3. Reversely tighten up the hexagonal nut to the sensor with the spanner; 4. Check the air leak using soapy water. Multipurpose: Suitable for Any Car Type - Suitable for tire pressure range less than 3.2 Bar, like sedans, SUV, MPV and etc. Type: Tire Pressure Monitoring System Sensor Working Voltage: 2 - 3.6V Display Working Voltage: 3.5 - 4.2V Optional Pressure Units: Psi / Bar Optional Temperature Units: .C, .F Operating Frequency: 433.92MHz / - 20KHz Monitoring Pressure Scope: 1.5 - 3.2 Bar(15-35psi) Display Battery Capacity: 280mAh Sensor Battery Capacity: 120mAh Material:ABS colour:Black + wood grain Package Contents: 1 x Tire pressure monitoring system 4 x external sensors 4 x anti-theft nuts 1 x wrench 1 x USB cable 1 x English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.