Features:OOTDTYRear-time control of preure and temperature of 4 tires; Low air preure high temperature alarm; High temperature leak low battery alarm.Smart-shock when the car is moving, no need to turn on off; Wirele by external sensors, easy install.Wirele 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 , the car automatically on when starting, and automatically off when the car stops.Specifications:Material:ABSSize:Approx.5.2x5x3.8cm/2.04x1.96x1.49inchColor:BlackPackage Includes:1 Set Tire PreureNote:.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.