Digital Car TPMS Solar Power Auto Security Alarm System LCD Display Internal External Sensors USB Charging for Automobiles Parts Feature: 1. Efficient Solar Panels: This car tire pressure monitor is equipped with efficient solar panels. It can be charged wirelessly and run all day long. It can be used even in the absence of light. The tire pressure sensor is also available for USB charging. You can choose between two modes. 2. Safe and Easy to Use: This tire pressure monitor has four tire pressure sensing at the same time, so it is safe and easy to use. The pressure and temperature of the front and rear tires can be transmitted simultaneously. You can clearly see the numbers and pressure values on the display. It's very convenient and efficient. 3. Automatic On-off: This tire pressure monitoring system adopts the design of automatic switch. This not only saves energy and electricity, but also eliminates our manual operation. The display turns on automatically when the car starts. When the car is silent, the monitor automatically shuts down. You don't need manual operation at all, convenient and easy to worry about. 4. Smart Chip: This tire pressure monitor has a smart chip inside. It can quickly sense abnormalities in car tires. Precise chirping alarm, zero delay. The display is updated every 6S. In addition, it has a high and low temperature alarm. When the temperature or pressure is below the set standard, the display will automatically show. 5. IPX7 Waterproof: This portable tire pressure monitor is IPX7 waterproof. As it moves through a curtain of rain, it decompresses the spray and crosses puddles. There is no problem with the normal use of parking water. Specification: Origin: Mainland China Model Number: Tire Pressure Monitor Material: ABS and PC Color: Black Specifications(Optional): Built-in/external Product size: 155*135*45mm Product voltage: 2.1V-3.6V Charging voltage: 4.2±0.03V Power supply mode: USB/ solar Battery: Host: 300 mah polymer battery Sensor: button battery Waterproof class: IP67 Pressure range: 4.3Bar Monitor: Colorful screen Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. 1 x Tire Pressure Monitor4 x Sensor1 x USB Cable4 x Anti-theft Nut (external plate include)1 x Wrench (external plate include)