【Real-Time Tire Monitoring】This TPMS system provides real-time data on tire pressure, temperature, and status for all four wheels, ensuring optimal vehicle performance and safety. 【Comprehensive Alarm System】Features high/low pressure, high temperature, and air leakage alarms, alerting drivers to potential tire issues before they become critical. 【Solar Powered Display】Combines solar power with USB charging, saving valuable in-car power outlets while ensuring continuous operation. 【Automatic Activation】Built-in displacement sensor automatically activates the main unit when the vehicle starts, eliminating the need for manual operation. 【Easy Installation】External sensors can be installed on all four tires, with the receiver placeable on any surface within the vehicle for convenient monitoring. 【Precise Problem Location】In case of abnormal tire pressure or temperature, the system quickly identifies and locates the problematic tire for prompt attention. Specifications: Display: LCD Screen size: about 9.5*8.5cm Working temperature: -20℃ ~ 70℃ Working voltage: 5V Daytime working current/nighttime working current/standby current: <15mA/<4mA/<50uA Transmitting frequency: 433.92MHZ+/-20KHZ Transmitting mode: FSK Pressure unit: BAR/PSI Charging method: solar energy/USB Battery: 1*303450 3.7V 500mAh