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Warm and important Tips: 1. What is the difference between WiFi and 4G version?. The device has navigator, play music, parking function, etc. In order to connect Internet, Wifi versions need to make your smartphone serve as a hotspot. For car owners who use Internet frequently when traveling, we recommend to buy 4G versions. 2. How to set up the steering wheel controls. WIFI versions. Setting-car infotainment-SWC-click clearall first-then click the icons. When it flashes, press the button on the steering wheel to match the icon. After learning successfully, it will change color. 4G versions. Setting-genaral-steering wheel setting. Please press the button on the steering wheel, and at the same time click the button on the screen to match, it will change color after matching. Warm and important Tips: 1. What is the difference between WiFi and 4G version?. The device has navigator, play music, parking function, etc. In order to connect Internet, Wifi versions need to make your smartphone