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 preure monitor is equipped with efficient solar panels. It can be charged wirelely and run all day long. It can be used even in the absence of light. The tire preure sensor is also available for USB charging. You can choose between two modes.2. Safe and Easy to Use:This tire preure monitor has four tire preure sensing at the same time, so it is safe and easy to use. The preure and temperature of the front and rear tires can be transmitted simultaneously. You can clearly see the numbers and preure values on the display. It's very convenient and efficient.3. Automatic On-off:This tire preure 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 preure 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 preure is below the set standard, the display will automatically show.5. IPX7 Waterproof:This portable tire preure monitor is IPX7 waterproof. As it moves through a curtain of rain, it decomprees the spray and croes puddles. There is no problem with the normal use of parking water. Specification:Origin: Mainland ChinaModel Number: Tire Preure MonitorMaterial: ABS and PCColor: BlackSpecifications(Optional): Built-in/externalProduct size: 155*135*45mmProduct voltage: 2.1V-3.6VCharging voltage: 4.20.03VPower supply mode: USB/ solarBattery: Host: 300 mah polymer battery Sensor: button batteryWaterproof cla: IP67Preure range: 4.3BarMonitor: 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. Packages:1 x Tire Preure Monitor4 x Sensor1 x USB Cable4 x Anti-theft Nut (external plate include)1 x Wrench (external plate include)