Features: 1.High Performance: High efficiency solar panels, super serial number capability, accurately monitor tire pressure and tire stability throughout the process. 2.Long Battery Life: Large capacity built in metal lithium battery, ensure unimpeded battery life even in cloudy days, and designed with upgraded all weather, full view LCD screen. 3.Stable Signal: With large volume alarm sound warning, has long receiving distance and stable signal, and support 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 detector package includes sensors, nuts, data cables and more to ensure simple installation and easy to operate. 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 PackageList: 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