EXTERNAL SENSORS & MINI RECEIVER: SinoTrack tire pressure monitoring system with 4 external cap sensors (0-8BAR/0-116PSI) and IP67 waterproof, sealed against dust and snow, easy installation, and transmit real-time signal, the battery (CR2450) can be replaced when the battery exhausted. Mini oval receiver with blue/red fill light is fixed on the dashboard with adhesive stickers. POWER SUPPLY METHODS: The tire monitoring system with a USB cable, ACC power cable, and OBD2 scan, you can choose powered by USB, ACC, OBD2 tool 3 mode, it does not occupy the car cigarette lighter socket, ensure the tire pressure monitoring system will work continuously. OBD2 adapter supports detection of car battery voltage health status. REAL-TIME MONITORING AND ALARM: TPMS real-time monitoring of tire status, cover high-pressure alarms, low-pressure alarms, high-temperature alarms, fast tire leak alarms, and alarms when other abnormal, effectively avoid tire burst, rear-end collisions, tire skidding, tire leaks, and tire wear. The flashing and voice alarms let you notice warnings, make sure you"'"re driving safely. RICH DATA DISPLAY: Compared with the other 4 tire TPMS on the market, BlueSkySea tire monitoring system has more data display, not only tire pressure, tire temperature, unit, but also car battery voltage (powered by OBD2), current time, and in-car temperature. Effectively reduce the driver looking down at watch or mobile phone. SUITABLE FOR 4 TIRES CARS: Tire pressure monitoring system is suitable for 4 tires cars, van, SUV, pickup, ATV, and more. 4 external sensors real-time monitoring of the pressure and temperature with precise for 4 tires and send the data wirelessly back to the receiver and display it. 12-months WTY and replacement of accessories (sensor), lifetime technical support. Specification: Receiver Receiving frequency: 433.92MHz Power supply mode: USB power supply, ACC power supply, OBD power supply Working voltage: DC 5V-12V input Pressure unit: bar/psi Temperature unit: / Working temperature: -20~+85 Storage temperature: -40~+125 External/Internal sensor: Transmitting frequency: 433.92MHz Pressure range: 0-8 bar / 0-116 psi Default low-pressure alarm value: 1.8 bar Default high-pressure alarm value: 3.0 bar Pressure accuracy: 0.1 bar / 1.5 psi Working voltage: DC+2.0-3.6V Working temperature: -20~+85 Storage temperature: -40~+125 Waterproof level: IP67 Battery: Built-in CR1632 button battery (the battery can be removed and replaced by yourself) Battery life: 1.5-2 years typical value Detect Power Supply Voltage The screen will display the source power, which is usually 5V through the car charger or USB interface, 12V through the OBD 2 connection, and 12V when directly connected to the car battery; the power supply voltage