Solar TPMS Sensor Digital USB Car Tire Preure Monitoring Automotive Smart System for Large Screen Display Rotatable Bracket Specifications Material: ABS Product Size: 12*6.3*2.5CM Operating frequency: 433.92MHZ Working voltage: 3.7V~5V Operating current: 6MA USB charging current: 250MA Dormant current: 4MA Storage temperature: -30~90 Operating temperature: -30~+85 Monitoring temperature range: -40~130 Air preure range: 0~3. 5Bar Accuracy: 0.1Bar Number of sensors: 4PCS Sensor type: built-in/external Charging method: Solar/USB Display battery capacity: 650mAh Display function: tire preure, temperature, clock, calendar Features 1, upgrade the large screen display, tire preure, temperature, time, calendar can be the same screen display, easy to watch, easy to understand more information 2, solar and USB two charging methods to improve the working time of the tire preure, the use will also be more convenient 3, a variety of alarm modes, air leakage / high preure / high temperature / low battery alarm function, at any time to understand the tire preure situation, to improve the safety of driving 4, with the car start function, the display will follow the car start or standstill to automatically turn on or hibernate. No manual operation, use more intelligent, reduce power consumption 5, rotatable bracket, multi-angle adjustment of the installation position, to meet more installation needs, can be installed in the front windshield or instrument panel