Feature: 1. HD LCD display. 2. Solar charging board and USB Charging. 3. TPMS high-precision tire pressure monitoring system. 4. Balance tire pressure, reduce tire wear, thereby ensuring safe driving. 5. Suitable for 4-wheel vehicles such as trucks or trucks or RV or buses. 6. Real-time automatic high-precision monitoring of the temperature and pressure of 4 tires. Specification: External Sensor. - Battery inside: Button cell CR1632 (Replaceable). - Battery life: 2-3years. - Working pressure: 0 -80 psi (Max) or 0 -5.6 bar(Max). - Operating Voltage: 5V. - Waterproof grade: IP67. TPMS Receiver: - Battery: built-in Li-ion battery. - Operating voltage: DC 5V. - RF transmission frequency: 433.92MHz¡À0.1MHz. - Pressure unit: psi or bar. - Temperature unit: Deg.C or Deg.F. - Size: about 9.5x8.2x2.6cm or 3.74x3.22x1.02in. - Funtion: Real-time monitoring of tire pressure,High temperature alarm,Low battery alarm,Low tire pressure alarm,Tire pressure high alarm,Air leak alarm,Sensor-update data.