Features: Tire Pressure Monitoring System(TPMS), helps the driver get real-time tire pressure data, temperature data and status, always keeping an eye on your car's performance. Cigarette lighter power charging, LCD colorful display, real-time monitoring the tire pressure & temperature. Showing four wheels' tire pressure and temperature simultaneously, very convenient for you to check the tire conditions. High/low tire pressure alarm, high temperature alarm and air leakage condition alarm, ensuring your driving safety. Easy to install, wireless transmission, no wiring needed. Specifications: Monitor: Type: Cigarette lighter Display Screen: LCD Operating Frequency: 433.92Mhz+/-20KHZ Operating Voltage: DC 12-24V Operating Current: 30mA Receive Sensitivity: -115dBm Pressure Nnit: BAR/PSI Working Temperature: -20 -80 USB: 5.1V 1A Monitor Size: Approx.8*5*3cm Monitor Weight: Approx.39g Sensor: Working Voltage: 2-3.6V Standby Current: 1uA Operating Frequency: 433.92Mhz+/-20KHZ Working Temperature: -20 -100 Battery: 1*CR1632 3V Transmission Mode: FSK Transmitted Power: 8dBm Sensor Size(each): Approx.2*2*2cm Sensor Weight(each): Approx.8g Package Information: Package Size: Approx.21*15*6cm/8.3*5.9*2.4in Package Weight: Approx.198g/7oz Package List: 1*Displayer 4*External Sensors 1*Wrench 1*Non-slip Mat 4*Nut 1*Button-head Cap 1*User Manual(English)