Feature:1. Robust and Reliable Technology: Designed with an IPX7 waterproof rating, this tire pressure monitor withstands harsh weather conditions. Enjoy stable signal transmission with strong anti-interference capabilities to keep your data secure and reliable.2. Dual Charging: Our solar tire pressure monitoring system features both solar and USB charging, ensuring continuous operation without the hassle of frequent battery replacements.3. Real-Time Monitoring: Stay informed with simultaneous monitoring of tire pressure and temperature for all four tires. Our tire pressure sensor delivers clear and precise readings directly to the display, allowing you to understand your vehicle's status at a glance.4. Intelligent Energy Efficiency: Equipped with an intelligent power management system, the device automatically turns on and off based on vehicle activity, conserving energy and ensuring a worry-free driving experience.5. Flexible Sensor Choices: Offers a choice between internal and external sensors to cater to different vehicle types and user preferences.Specification:Item Name: Tire Pressure Monitoring SystemMain Material: ABS, PC, CopperHost Battery: 3.7V 300mAh (Included)Operating Voltage: 3.7VOperating Temperature: 70°CWaterproof Rating: IPX7Pressure Range: 0~6 BARTransmission Frequency: 433.92 MHzTransmission Power: >10 dBmCharging Voltage: DC 5.1VProduct Color: BlackProduct Size: 9.4*6.7*2.9cm/3.7*2.64*1.14inchPackage List:1 * Host4 * Sensors1 * Double-sided Tape1 * Charging Cable1 * User Manual