Solar Tire Preure Monitoring SystemCar TPMS Main Feature Color LCD digital displayfor clear display Real-time monitoring of tire preure and temperature. 6 Protections for Safety Driving High-Preure Alarm Low-Preure Alarm Air Leakage Alarm High-Temperature Alarm Sensor Low Battery Alarm Sensor Connection Failure Alarm Solar+USB Charging, convenient and stable Automatically power onwhen opening the door (Sensing vibration) Automatically power offafter parking for 3 minutes (Without vibration) 2 kinds of the installation position: Center console Windshield Specifications Model: Solar TPMS Working preure: 0 - 3.5BAR Waterproof grade: IP67 Battery type: 280mAh Li-ion battery Charging mode: USB + solar charging Working Frequency: 433.92MHZ Input Voltage: DC 12-24V Working Voltage: 3.7-5v USB Charging Current: 250ma Sleep Current: 4ma Storage Temperature: -30C~+90C Working Current: 6ma Working Temperature: -30C~+85C