Features: Easy to install.  Powered by USB, no wiring required.  Can be put into the car glove box.  This tire pressure monitoring system contains a monitor and four sensors.  When you use the external sensor, sensor use anti-theft nut directly fixed in the original car gas nozzle.  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.  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.   Specifications: Receiver Parameters;  Working Voltage: DC5V;  Working Current: <15mA;  Working Frequency: 433.92MHz;  Working Temperature: -40℃~85℃;  Communication Line Length: 200mm;  Fixed Form: 3M tape;   External Sensor Technology Parameters;  Working Voltage: 2.1V~3.5V;  Working Frequency: 433.92MHz;  Pressure Measurement Range: 0~116PSI;  Temperature Measurement Range: -30℃~85℃;  Working Temperature: -30℃~60℃;   Color: Black;  Packing: Carton;  Package Weight: 158g / 5.6oz;  Package Size: 18*13.5*4.5cm / 7*5*1.8in;   Package List: 1 * Tire Pressure Monitoring System;  4 * Sensors;  4 * Anti-lost Nuts;  1 * Portable Tool;  2* Magic Tape;  1 * User Manual Manual