Wireless Transmission: No need for complicated wiring, the TPMS sends data wirelessly to your for Android device. 4 Sensors: With 4 sensors, this TPMS provides accurate tire pressure monitoring for all your vehicles. Alarm System: The TPMS comes with an alarm system that alerts you when tire pressure is low, ensuring safe driving. for Android Car Player / for Android GPS Navigation. The TPMS receiver can be connected to for Android car DVD via USB port. Tire pressure and temperature data displaying on for Android Car DVD screen. Sound Alarm via car speakers and screen alarm when abnormality occurs. Prevent tire burst, extend the tire's life and save fuel. Sensor wakes up automatically when tire starts running. Quickly update tire pressure and temperature data to for Android TPMS App. Automatically sleep to save energy after parking. Sensors Disconnection Alarm The factory default values of this product are: The factory default values of this product are: 1. High pressure alarm value: 3.1 Bar 2. Low pressure alarm value: Less than 1.8 Bar 3. High temperature alarm value: 75C 4. Default air pressure unit: Bar Sensor technical parameters: Working voltage: 2.1V-3.6V Air pressure measurement range: 0-8Bar Temperature measurement range: -40-125 Waterproof standard: IPX67 RF working frequency: 433.92MHz Receiver technical parameters: Working voltage: DC12V Maximum working current: less than 15mA High frequency working frequency: 433.92MHz Working temperature: -40-85 Colour:Black Material:ABS Package Contents: 4pcs x Car External Tire Pressure Sensors 1Pcs x TPMS Moudel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.