At the back of the body, you will find a port to connect USB-C devices to the Envision Glasses. This port is used to charge the device with the provided cable, but it can also be used to attach earphones, hearing aids, or speakers to your glasses.
Using other devices that don't support USB-C
If you have speakers or earphones that do not work with USB-C, you can also use a converter. So if your earphones have a traditional 3.5mm audio jack, try looking for a USB-C Male to Audio Jack Female Converter. Make sure that the converter does not have DAC built-in. Plugin the audio jack of your earphones in the female audio jack of the converter and the USB-C in the back of the Envision Glasses. That's it!