Feature: 1. Easy to install. 2. Powered by USB, no wiring required. 3. Can be put into the car glove box. 4. This tire pressure monitoring system contains a monitor and four sensors. 5. When you use the external sensor, sensor use anti-theft nut directly fixed in the car gas nozzle. 6. Sensor measuring tire pressure and temperature, and send the information of tire to TPMS receiver, the receiver send the date to DVD by USB port. 7. When the tire pressure is low or leak and high temperature, DVD have a warring through sound and light,so as to remind drivers to pay attention to vehicle safety. Specification: Specifications: Receiver Parameters Working Voltage: DC12V Working Current: <15mA Working Frequency: 433.92MHz Working Temperature: -40℃~85℃ Communication Line Length: 200mm Fixed Form: Self Adhesive tape External Sensor Technology Parameters Working Voltage: 2.1V~3.6V Working Frequency: 433.92MHz Pressure Measurement Range: 0~116PSI Temperature Measurement Range: -30℃~85℃ Working Temperature: -40℃~125℃ Color: Black Packing: Carton Package Weight: 158g / 5.6oz Package Size: 18*13.5*4.5cm / 7*5*1.8in TPMS Receiver Install 1.TPMS receiver receives the sensor sign, and send the date of tires to DVD by USB port. 2.USB interface of the DVD was in the store content box. 3.When the TPMS receiver is installed, be sure to stay away from interior sources of interference, such as navigation, DVR , mobile television and other high power jamming equipment at least 60cm or more ( recommended that the receiver can be fixed in storage box by self adhesive stick) TPMS APP Inatall: 1.Copy the APP file called to U disk, the name of file is "USB_TPMS" 2.Open the interface of DVD after the U disk connected to the USB interface. 3.Open the "APP Manager" or "Software Manager" 4. And install APP, we can open the APP when the installation is complete. Sensor ID Setting: Before shipping, sensor ID and position have set in receiver, you can install as the sensor position, no need setting. Users can be installed in the accordance with the marked the location of the information on the sensor. Only when the sensor is damaged,it needs to be paired on the APP interface. Parameter Settings: ( Set high pressure, low pressure, high temperature alarm thresholds) 1.The default of low pressure alarm thresholds is 26PSI 2.The default of high pressure alarm thresholds is 45PSI 3.The default of high temperature alarm thresholds is 75℃ 4.The default pressure unit is PSI . Package List: 1 * Tire Pressure Monitoring System 4 * Sensors 4 * Anti-lost Nuts 1 * Portable Tool 2* Tape 1 * User Manual (English) Note: When pressure and temperature of tires appear abnormal, the system can emit sound and light alarm, the user does not need to observe the system's display, so as not to affect the vehicle's driving.