Features: Brand new and high quality USB and Solar power charging; High and low pressure, leak alarm; LCD display screen, Simple user interface Real-time monitoring tire pressure and temperature; The tire position of any swap function(no need to remove the sensor in the tire) Sensor Specification: Please install in by Professional car center More stable and accurate Operating frequency: 433.92Mhz0.1MHZ Working Temperature: -40~ 125 Operating Voltage: 2.0-3.6V Working current: static1uA, working current 15mA External Sensor (Optional): Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Operating frequency: 433.92Mhz0.1MHZ Operating Voltage: 5V Working current: static50uA, working current 15mA Working Temperature: -20~70 Monitioring range: temperature:-40~125, pressure:0bar~3.5bar Accuracy: temperature : 2, pressure: 0.1bar Description: Solve the sensor does not work: Match sensor(Vent) Long press /'/'menu key/'/' 3 seconds to /'/'U/S/'/',then short press /'/'menu key/'/' several times to enter/'/'LID/'/' interface,it shows ID of four tires and car icon. Short press /'/'left/right select key/'/' to learn ID opertion.Select tire you plan to learn ID of sensor by press/'/'menu key/'/',default setting is /'/'FL/'/' When tire is selected,display new /'/'ID/'/' in receiver after active sensor//'s ID(internal sensor active by charging/vent tier). Do the same operation to match the other three sensors.When all sensor are matched,short press /'/'menu key/'/' to save and go to /'/'Ex/'/'. Package Included: 1 x Solar Charging Tyre Pressure Monitoring System 4 x External sensors 1 x USB cable 1 set x Accessories (tool) If you have not received your shipment within 30 days from