Package Includes: 1 x Car Tire Pressure Monitor Description Report Item / Suspicious Activity 1.No need for internal and external sensors (1).The air pressure is too high (2).Speed slows down (3).The air pressure is too low (4).Speed becomes faster (5).The product uses reading the tire speed as the monitoring method, connects the original car computer data bus CAV-OBD plug, and automatically monitors the original car ABS data after passing, and automatically shuts down when the flame is turned off. 2.Four gears adjustable/set sensitivity 1.A total of 4 levels of sensitivity can be adjusted(Long press the R key for 2 seconds to set the sensitivity, press the L key to cycle selection) 2. When the tire pressure is lower than 25% of the normal value of the original car tire pressure, the display will automatically alarm 3.Tips for fatigue driving / stay away from driving hazards 1. Every 2 hours of driving (the time can be set), the buzzer will sound [BiBiBi] to remind you 2. Press any key to turn off the sound, stop the engine and turn off the fire, and the reminder function will restart the timer 3. Fatigue driving is strictly prohibited 4. Buzzer to remind, press any key to turn off the sound Function setting method: 1. Learn tire pressure (1) First set the tire pressure value of the 4 tires to the normal pressure value