Features: Rear-time control of pressure and temperature of 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:Plastic Size:Approx.8.6x7.5x2.6cm/3.38x2.95x1.02inch Color:Silver/Black Model: U901T Voltage: 8V-16V Storage temperature: -30 ~ +85 Operating temperature: -20 ~ +80 Frequency: 433.92mhz Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 Set Tire Pressure Monitor