Features: Type: Intelligent Solar TPMS Car Tire Pressure Solar charging, LCD color display, adjustable brightness Real-time monitoring of pressure & temperature Low air pressure/high temperature warning Set sensor: learn new sensor ID code when replacing sensor Two units (PSI / Bar) interchangeable, you can set the one you like. Pressure value: about 0-4 bar Suitable for many types of cars, for cars, ORV, SUV, MPV, Minibus, Station wagon, etc. Intelligent On and Off: When the car starts, the machine's vibration automatically opens and the machine automatically turns off when stationary, without manual operation. Specification: Receiver specification: Solar charging LCD display Attached to the windshield for installation Operating frequency: 433.92Mhz ± 50KHz Operating voltage: 3.7-5 V Working temperature: -20 °C -75 °C Internal sensor: Working temperature: -40°C -125 °C Working frequency: 433.92MHZ Working humidity: Max95% Tire monitoring range: 0bar-8bar Deviation±0.013 Battery life: 5 years Waterproof: Ip67 Working voltage: 2.1-3.6V Transmitting power: R&D environment test below -17db Working pressure: 0 – 99Psi Alarm pressure: 46.5Psi or <26.0Psi Pressure accuracy: ±1.5Psi External sensor: Working temperature: - -20°C -85 °C Working frequency: 433.92MHZ Working humidity: Max95% Tire monitoring range: 0bar-8bar Deviation±0.013 Battery life: 2 years Transmitting power: R&D environment test below -17db Waterproof: Ip67 Working pressure: 0 – 99Psi Alarm pressure: 46.5Psi or <26.0Psi Pressure accuracy: ±1.5Psi Package includes:: 1 set*Internal sensor/1 set*External sensor