Feature 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 40°C~68°C, 433.92MHz±20.00MHZ 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. 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: 40°C~68°C Working Temperature: -20°C~80°C Storage Temperature: -30°C~85°C Frequency: 433.92MHz±20.00MHZ Package List 1 x Tire Pressure Monitoring System4 x Sensor 4 x Nut 1 x Anti Slip Pad 1 x Manual 1 x USB Cable 1 x Spanner