The direct tire pressure monitoring system equips each tire with a high-sensitivity sensor, which can monitor the pressure and temperature of the tire in real time. After digital-to-analog conversion, the data is transmitted by radio signals to the monitor on the bridge. Pressure and temperature values are displayed visually immediately. Features:Digital LCD Screen: the monitor displays real-time pressure & temperature, it can be placed anywhere stably and you can easily read the data.4 wireless external sensors, easy installation & receive real-time signal. The pressure and temperature data can be switched, with pressure unit: PSI/Bar and temperature unit: C/F selectable.Copper core sensor is more stable and accurate than aluminum core, which are suitable for using on rainy or hot days.2 charging ways (Solar Power & USB Charging): ensure the tire pressure monitoring system will work continuously, and do not occupy the car cigarette lighter socket.6 alarm modes: Fast leak alarm, slow leak alarm, high pressure alarm, high temperature alarm, sensor fault alarm and sensor battery low power alarm.Provide effective information to car drivers to keep enough tire pressure, prevent the happening of the blowout accident, increase the security of driving a car, reduce the additional generated by low tire pressure oil consumption, and prolong the service life of tires.If the tire pressure is too high or too low during driving, the tire will leak due to any reason (such as foreign matter piercing the tire, tire scratching...), and the system will automatically alarm immediately to ensure safe driving.Tire pressure monitoring system is suitable for car tire pressure range less than 6.0 Bar, like sedans, SUV, MPV and etc. Specifications:Receiver Host-polymer battery recharge 400 times,capacity loss 25%-Working Temperature: -20~85-Working Frequency: 433.92MHZ-Test The Reception Sensitivity: -91dbm-USB Input Current: DC 5V-Working Current: 14mA (peak) ; 2.5~2.6mA(standby)-Battery Capacity: 400mA-Solar Charging Current100mah Sensor-Working Temperature: -20~125-Working Frequency: 433.92MHZ-Working Humidity: Max 95%TiremonitoringRangeValue:0~3.5bar/0~50PSI,Deviation±0.013-Tire Temperature Monitoring Range Value: -40 ~ 125, Deviation ± 3-Battery lift: 5 Years-Transmit Power: R & D environment test below-17dbColor: BlackPacking: CartonPackage Weight: 221g / 7.8ozPackage Size: 18*13.5*4.5cm / 7*5*1.8inNotes:Due to the light and screen difference, the item's color may be slightly different from the pictures.Please allow 1-3cm differences due to manual measurement. Package List:1 * Tire Pressure Monitoring System4 * Sensors4 * Anti-lost Nuts1 * Portable Tool1 * USB Cable1* Tape1 * User Manual(English)