Features: Rear-time control of pressure and temperature of 4 tires; Low air pressure / high temperature alarm; High temperature / leak / low battery alarm. Smart-shock start when the car is moving, no need to turn on / off; Wireless connect by external sensors, easy install. Wireless connection by sensors, easy installation; At the same-time, USB charging is-also convenient and practical. Colorful LCD digital displaying, clear to show tire information. Built-in vibration sensor, the car automatically turns on when starting, and automatically turns off when the car stops. Specifications: Material:ABS Size:Approx.5.2x5x3.8cm/2.04x1.96x1.49inch Color:Black Package Includes: 1 Set Tire Pressure Monitor note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.