Features 1Solar tire pressure monitor builtin rechargeable battery supports solar automatic charging and can also be charged via USB. 2It supports up to 5 tires (spare tires) and the display shows the pressure or temperature of the 4 tires at the same time. 3With pressure/temperature detection and warning leaks alarm. Dual alarm of display and sound good warning effect. 4Users can set the tire pressure and temperature alarm standard values which can meet different needs. 5Selectable PSI/BAR of pressure transmitter. And the / unit of temperature can be selected. 6The display automatically turns on and it also has a vibration wakeup function. Easy to install and stable performance Specification Item Type: Tire Pressure MonitorMaterial: ABS+Nylon Fiber+Copper NozzleTire Pressure Monitor:Frequency: 433.92MHz20.00MHzWorking Temperature: -20-80Storage Temperature: -30-85Lithium Battery: 280mAh (built-in)Charging Method: USB+SolarFactory Default High and Low Pressure Values: 3.0Bar-2.0BarWorking Current: 5MAFactory Default Temperature Value: 68Installation Location: Center ConsoleWaterproof And Dustproof Rating: IP67Sensor Parameters:Frequency: 433.92MHz20.00MHzSensor Pressure Range: 0-3.5BARStorage Temperature: -30~85Accurate Pressure: +/-0.1BarAccurate Temperature: +/-1External Working Temperature: -20-80Built-In Working Temperature: -40-+120External Battery: CR1632 (include) Package List 1 x Tire Pressure Monitor4 x Sensors1 x Manual1 x Wrench4 x Nuts1 x Tape