Features:Brand new and high quality;USB and Solar power charging;High and low preure, leak alarm;LCD display screen, Simple user interface;Real-time monitoring tire preure and temperature;Battery life:24 monthsWaterproof grade:IPX7The tire position of any swap function(no need to remove the sensor in the tire)Sensor Specification:Please install in by Profeional car centerMore stable and accurateOperating frequency: 433.92Mhz0.1MHZWorking Temperature: -40~85Operating Voltage: 2.0-3.6VWorking current: static1uA, working current15mAExternal Sensor (Optional):Easy to install, convenient to replaceDust-Proof / Water-Proof / Anti-theftOperating Voltage: 5VWorking current: static50uA, working current15mAMonitioring range: temperature: -40~85, preure: 0bar~3.5barAccuracy: temperature: 2, preure: 0.1barPackage Included:1 x Solar Charging Tyre Preure Monitoring System4 x External sensors1 x USB cable1 set x Acceories (tool)