This is because the format of the SD card is not consistent with the format of the headphones. No need to replace a new SD card. You just need to connect to the RoadCAM App, find the format in the settings, and then perform the formatting operation. 

Supports pairing with Bluetooth helmets and headphones from the same brand, as well as pairing with Bluetooth headphones from other brands. 

After performing the previous or next song search in FM operation, the program will sequentially search for each FM frequency point within the range of 76-108MHz, increasing or decreasing by 100KHZ each time, until a valid signal is found or all frequencies are searched. Its duration is related to the strength of the local FM signal and various interferences. 

Long press the multifunction key to exit pairing status and turn off the power, clear pairing records, and then reconnect 

Please note that the WiFi password should not be set to less than 8 digits. If the password is set to a number less than 8 digits, we will not be able to connect to WiFi. We need to provide a refresh software to reset the WiFi password to the initial password before resuming use. 

When you hear the prompt that you need to format the SD card, this is not the file that really needs to be deleted from the SD card. You just need to enable the WiFi function, connect to the application, find the format in the settings, and then click Format! 

Long press the "Recorder and Camera On/Off Button", and the green light will start flashing at a frequency of once every 3 seconds. At the same time, the blue and red lights flicker alternately. Short press the "WiFi button" and the green light will flash quickly, with a frequency of once every 0.5 seconds. Open Phone Settings WLAN, find 'FreedConn' and click on Connect. The initial password is 12345678, and you can change it through the app. Open the GoPlus application, click on the icon, connect successfully, and start using the camera function.