Wireless Solar Power Supply : No need for batteries or cords, this tire temperature monitor is powered by solar energy, making it eco-friendly and convenient to use. External Time Car General Tire Detection Monitoring : This Vehicle Sensors Tire Pressure alarm can detect Vehicle Sensors Tire Pressure and temperature from the outside of the car, providing accurate and reliable monitoring. 5V Voltage : With a voltage of 5V, this Vehicle Sensors Tire Pressure alarm is compatible with most cars and can be easily installed without any complicated wiring. Alarm Systems Security : This Vehicle Sensors Tire Pressure alarm is not only useful for monitoring Vehicle Sensors Tire Pressure but also serves as an alarm system for your car, ensuring added security. [SOLAR POWER USB CHARGING]: 2 charging ways ensure the Vehicle Sensors Tire Pressure monitoring system works continuously and won't occupy your car's cigarette lighter socket. [DIGITAL LCD DISPLAY]: The monitor displays real-time pressure and temperature, can be placed anywhere stably, and you can easily read the data. [Easy to use]: 4 wireless external s, easy installation and real-time signal reception.Working frequency: 433.92MHz Working voltage: 3.7-5V USB charging current: 250ma Sleep current: 4ma Product weight:220g Long term storage temperature: -30 C~+90 C Working current: 6ma Working environment: -30 C~+85 C Monitoring temperature range: -40 C~+130 C Monitoring pressure range: 0-3.5Bar Notice: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Notice: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.