100% brand new and high quality. LCD digital displaying, clear to show tire information Wireless connect by interior/external sensors, easy install Real-time automatic monitoring and warning of information, such as low tire pressure, high tire pressure, rapid air leak, high tire temperature and low battery voltage. Accurately receive the signal, and reflect the tire pressure condition truthfully and intuitively. Note: The host must be turned on before installing the sensor. Press and hold the left button for 3 seconds Function: Rear-time monitoring pressure & temperature of 4 tires Low air pressure / High tire pressure alarm High temperature / Leakage / Low Battery Alarm Specifications: Material: ABS + aluminum Types: Interior sensors,exteral sensors Display Powered: solar powered, USB cable powered. Working Frequency: 433.9200MHz±0.1Mhz Temperature Monitoring Range: -40~ +120 Pressure Monitoring Range: 0-5bar Precision: temp ±2 ; pressure ±0.1bar Note: 1, the sensor and receiver have been paired at the factory, change the sensor or receiver only need to be re-paired! 2, the display automatically turns on when detecting vibration signals in hibernation state, displays tire pressure and temperature data, and automatically sleeps after parking for more than 10 minutes. 3, press the "-" button for 3 seconds to turn on/off 4, tire running speed of more than 20 km, sensor pressure, temperature automatic update data. 5, alarm description a) When the tire pressure exceeds the set safety range value or leakage, the corresponding tire position pressure value and alarm symbol flash on the display, while the buzzer sends a continuous bi.bi.bi sound prompt; Press any key to cancel the alarm tone, but the fault icon is still displayed. b) When the tire temperature exceeds the set safety range value, the corresponding tire position temperature value and alarm symbol on the display flash, and the buzzer emits a continuous bi.bi.bi. Acoustic cue; Press any key to cancel the alarm tone, but the fault icon is still displayed. c) When the tire sensor power is insufficient, the corresponding tire symbol on the display and the low electric symbol of the transmitter flash, while the buzzer emits a continuous bi.bi.bi. Acoustic cue; Press any key to cancel the alarm tone, but the fault icon is still displayed.