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; Battery life:24 months Waterproof grade:IPX7 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: 433.92Mhz±0.1MHZ Working Temperature: -40℃~﹢85℃ Operating Voltage: 2.0-3.6V Working current: static≤1uA, working current≤15mA External Sensor (Optional): Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Operating Voltage: 5V Working current: static≤50uA, working current≤15mA Monitioring range: temperature: -40℃~﹢85℃, pressure: 0bar~3.5bar Accuracy: temperature: ±2℃, pressure: ±0.1bar Package Includes: 1 x Solar Charging Tyre Pressure Monitoring System 4 x External sensors 1 x USB cable 1 set x Accessories (tool)