Functions:1.Automatic wrong wiring shutdown: When the positive and negative poles of the power line are inverted, the machine will be automatically shut down to protect the machine (effectively reducing the rate of customer complaints caused by customer improper operations)2. Use the mobile app to locate and find the car: use the mobile phone software to locate and find a car. While Bluetooth is connected before turning off the engine, you can use the mobile app to locate and find the location of the car.3. Support FM and built-in Aux input.4. Support TF card (up to 32GB) slot and standard USB interface.5. 24 hours digital display clock and date.6. can charge for mobile phones or other USB devices.7. colorful backlights of power buttons for decoration in your car.8. memory shutdown function, the sound state of music or music during memory shutdown