Feature 1, This solar powered monitor, has a micro USB charging port to fit for no-sunlight weather. You can use it even in dark situation. 2, IP67 waterproof sensors, no worry about rainy days and even bad weather. 3, Adopts wireless external sensor technology, and support PSI/BAR pressure unit and Celsius/Fahrenheit degree temperature unit, providing you with much convenience. 4, LCD screen can display monitored pressure and temperature of 4 tires real-timely. 5, Simple installation, universally fits for most car, vehicles, SUVs, etc.Features: This solar powered monitor, has a micro USB charging port to fit for no-sunlight weather. You can use it even in dark situation. IP67 waterproof sensors, no worry about rainy days and even bad weather. Adopts wireless external sensor technology, and support PSI/BAR pressure unit and Celsius/Fahrenheit degree temperature unit, providing you with much convenience. LCD screen can display monitored pressure and temperature of 4 tires real-timely. Simple installation, universally fits for most car, vehicles, SUVs, etc. With tire leaking warning function. There is beep warning for abnormal tire pressure and temperature, creating a safer environment. Specification: Condition: Brand new Material: ABS plastic Color: Black Function: Tire pressure monitoring Operating Voltage: 3.7 - 5 v Storage Temperature: -30 - 90 Working Temperature: -30 - 85 RF Emission Frequency: 433.92MH50KHz RF Signal Sensitivity: -90dbm Display Mode: LCD color display Bright Screen Current: 6mA Black Screen Current: 4mA Package List: 1 x Solar Digital Display Monitoring System 4 x External Sensors 4 x Nuts 1 x Wrench 1 x Mounting Bracket 1 x Screw 2 x Patch 1 x Instruction Manual