Feature: 1. By using the advanced 4-in-1 wireless sensors that highly integrated pressure and temperature sensor we offer the top of the line and reliable TPMS for you. 2. Automatic solar charging, using higher quality and more durable solar lithium battery panels, which can extend the use time and help focus driving. 3. The intuitive monitor and smart buzzer secure a safer driving experience for you. 4. Real-time detection of tire pressure/temperature, battery power, leakage / low battery alarm. Instant audio alarm of abnormal pressure or temperature. 5. Wireless connect by sensors, easy installation. 6. LCD display screen, simple user interface. Sleep mode available. Specification: This wireless tyre Solar Charging TPMS is supplied with 4 external sensors and a digital monitor to monitor the tyre voltage and temperature of your vehicle 24-hour every day, and it also has a clock function. Features: By using the advanced 4-in-1 wireless sensors that highly integrated pressure and temperature sensor we offer the top of the line and reliable TPMS for you. Automatic solar charging, using higher quality and more durable solar lithium battery panels, which can extend the use time and help focus driving. The intuitive monitor and smart buzzer secure a safer driving experience for you. Real-time detection of tire pressure/temperature, battery power, leakage / low battery alarm. Instant audio alarm of abnormal pressure or temperature. Wireless connect by sensors, easy installation. LCD display screen, simple user interface. Sleep mode available. Specifications: Input Voltage: 3.7 V~5V（USB） Sleep current: ≤4mA USB charging current: ≤250mA Working Temperature: -30℃ ～ 85℃ Working Frequency: 433.92 MHz Monitoring Temperature range: -40℃~130℃ Monitoring Air pressure range: 0~3.5Bar Product size: 93*51*27mm Battery: External Sensor CR1632(140mAh) / Solar lithium battery 3.7V 500mAh Package size: 16*14*6cm Packge weight: 280g Pakage list: 1 set Solar Charging Tyre Pressure Monitoring System Package List: 1 set Solar Charging Tyre Pressure Monitoring System