Features: 1. High Performance: Efficient solar panels with superior serial number functionality, accurately monitoring tire pressure and stability throughout usage. 2. Long Battery Life: Large capacity built-in lithium battery, ensuring continuous operation even on cloudy days, featuring an upgraded all-weather, full-view LCD screen. 3. Stable Signal: Equipped with a loud alarm for alerts, it boasts a long receiving range and a stable signal, supporting tire position interchange. 4. Parameter: Air pressure setting range of 1.0~3.5BA, temperature setting range of 40C~68C, 433.92MHz20.00MHZ frequency, DC 5V voltage. 5. Easy Installation: This highly accurate tire pressure detection system includes sensors, nuts, data cables, and more for a straightforward installation and user-friendly operation. Specification: Item Type: Solar Tire Pressure Monitoring System Material: ABS Battery: 4 x CR1632 coin cell batteries 120mAh 3.0V (built-in) Display Battery: 1 x lithium polymer battery 400mAh 3.7V (built-in) Air Pressure Setting Range: 1.0~3.5BA Temperature Setting Range: 40C~68C Working Temperature: -20C~80C Storage Temperature: -30C~85C Power On Voltage: DC 5V Frequency: 433.92MHz20.00MHZ Package List: 1 x Tire Pressure Monitoring System 4 x Sensor 4 x Nut 1 x Anti Slip Pad 1 x Manual 1 x USB Cable 1 x Spanner