Features: Solar powered charging, no need to connect to the car's cigarette lighter for charging Color LCD digital display, clearly showing tire information Real-time monitoring of tire preure and temperature for all four tires Low preure/high temperature alerts High temperature/leak/low battery alerts Intelligent vibration startup, no need to manually switch on while driving Wirele connectivity with sensors, easy installation and attachment to the gla Built-in and external sensor options available to meet all your needs Two unit options (PSI/bar) that can be switched, allowing you to set your preferred unit. Intelligent power on/off The device will automatically turn on when the car starts based on the vibration, and will automatically turn off when stationary, without the need for manual operation. External Sensors: Easy installation and convenient replacement Dustproof/waterproof/anti-theft Resistant to high and low temperatures IP67 protection/waterproof Operating temperature: -20C to 85C Battery life: 2 years, replaceable (external sensor).