Features: 1.Solar charging, no need to connect the car cigarette lighter to charge, wireless connection with the sensor, easy to install, attached to the glass. 2.Color LCD digital display, clearly display tire information, real-time monitoring of the pressure and temperature of 4 tires. Day and night are very clear, and the receiver can display the time and monitor tire pressure and temperature in real time. 3.With alarm function, low air pressure/high temperature alarm, high temperature/leak/low battery alarm, intelligent shockproof cover when the car is driving, no need to open/close. 4.The internal sensor and external sensor options can meet all your needs, two units (PSI / Bar) are variable, you can set a unit you like. 5.Solar charging + USB charging, new energy solar charging provides working power. High power transmission and high performance. Specification: Item Type: Tire Pressure Monitor Material: PC+nylon plus fiber/copper nozzle Host Parameters: Host Built-in Lithium Battery: Capacity 280mAh, Model 402040 Display: Pressure, temperature, air leakage alarm Frequency: 433.92MHz20.00MHz Working Temperature: -20-80 Storage Temperature: -30-85 Charging Method: USB+solar Lithium Battery: 280mAh Charging Voltage: DC 5V Factory Default High And Low Pressure Values: 3.0Bar-2.0Bar Working Current: 5MA Factory Default Temperature Value: 68 Installation Location: Center console Sensor Parameters: Button Battery: Capacity 60mAh, model CR1632 (included) Waterproof And Dustproof Rating: IP67 Frequency: 433.92MHz20.00MHz Sensor Pressure Range: 0-3.5BAR Storage Temperature: -30-85 Accurate Pressure: +/-0.1Bar Accurate Temperature: +/-1 External Working Temperature: -20-80 Built-in Working Temperature: -40-120 External Battery: CR1632 (NOT Included) Built-in Battery: CR2050 (Included) Instructions For Use: Plug and play