Feature 1、Balance Tire Pressure and Temperature: The system supports fuel saving, air leakage forseeing and tire wearout reducing and balance tire pressure which will ensure safety driving. 2、LCD Screen: LCD display mode ensures the high resolution ratio and guarantee the high definition and no splash screen condition. 3、Signal Stability: With a large volume alarm sound prompt, it can receive long distance. The signal is stable, supporting the tire position swap. 4、Solar Power and USB Charging: This system with 2 charging ways which ensures the tire pressure monitoring system will work continuously, rechargeable lithium battery to get electricity can increase the tires's life. 5、Premium Material: This solar tire pressure monitoring system is made of premium ABS and copper alloy materials, which are wear resistant and durable. 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 Solar Tire Pressure Monitoring System4 x Sensor 4 x Anti Theft Nut 2 x Non Slip Mat 1 x USB Data Cable 1 x Instruction 1 x Wrench