Features: Real-Time Tire Pressure Monitoring: Provides accuracy tire pressure data to ensure safety and performance while driving. Multi-sensor compatibility: Dynamically monitors the tire pressure of 4 wheels at the same time, prevent tire blowout damage, improve fuel efficiency, prolong tire life, and ensure driving safety. SMART MONITORING: Connects to your smartphone via Bluetooth-compatible to receive real-time alerts and notifications about changes in tire pressure even when you are away from the vehicle. WIRELESS EASY TO INSTALL: Our car tire pressure monitoring system features a hassle-free setup process and requires no complicated wiring, saving you time and effort. Satisfactory service: If you have any questions, please contact us in time. We will provide you with better products and services. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Communication method: Bluetooth-compatible 5.0 Working voltage: 2.1-3.3V Quiescent current: 1μA Bluetooth-compatible working frequency: 2.4GHz Bluetooth-compatible transmit power: 4dB Response time: 4S Waterproof grade: IP67 Working humidity: 95 Tire pressure monitoring range: 0-100PSI Tire pressure monitoring error: ± 3PSI Working temperature: -30-70°C Storage temperature: -30-70°C Battery life: 2-3 years Battery capacity: 140mAh external Package List: 4pcs x Tire Pressure Monitoring System