Features: Mini display, control unit and display 2 in 1 design Monitor the pressure and temperature of each working tire Alarms on under inflation, over inflation, leaks and high temperature Auxiliary to the best value of the tire, fuel and the whole vehicle 2 kind of detectors at the user\'\'s option Reliable direct monitoring system Tested ok at speed over 180km/h (110mile/h) Long life detectors with power saving work mode 2 pressure units at the user\'\'s option 2 temperature units at the user\'\'s option Double alarms in flashing words and beeping Specifications: Transmission frequency: 433.92MHz (EU)/315MHz (US) Pressure measuring range: 0 to 4.5 bar/0 to 72psi Temperature measuring range: -40°C - 99°C/-40°F - 210 °F Control unit working temperature range: -20°C - 60°C Detector working temperature range: -40°C - 125°C