C240 Solar Power Car External TPMS Sensor Tire Pressure Monitoring System Features: 1. Monitor tire pressure and temperature in real time to enhance the driving safety. 2. Visual and auditory warning of tyre pressure and temperature anomalies. 3. Smart sleep mode saves energy to achieve low power consumption. 4. Also has tire leakage warning function, and the tire pressure and temperature data are clear to read. 5. psi/bar pressure unit and C/ F temperature unit are optional. Specification: Material: ABS Color: As Pictures Shown Type: Digital Model: C 240 Working Frequency: 433.9200MHz  Working Voltage: 3V, 3V, 3.7V Working Current (Static Current): ≤1uA, ≤1uA, ≤50uA Working Current (Dynamic Current): ≤15mA, ≤15mA, ≤5mA Work Environment: -40℃ - + 85℃ Pressure Detection Range: 0~99 psi, 0~5 bar Charge Mode: Solar Power / USB Battery Lifespan: 3Y External Sensor      Package list:  1 * Solar Power Digital Display Monitoring System Screen 4 * External Sensor 4 * Nut 1 * Wrench 1 * Manual 1 * Double-sided Adhesive Note: This product can monitor tire pressure and temperature in real time and give warning. However, it cannot prevent the occurrence of accidents, so we do not assume the responsibility for direct or indirect losses caused by the damage of this product.