To get the best experience from your Aunu M50 earphones, place both earphones in the charging case and charge them until the LEDs on the charging case turns off, meaning it has reached 100%.
Follow the instructions in your user manual by removing the Left earbud first, then the Right earbud. Pair your Left earbud to your media device, then put both earbuds back into the charging case. Then remove only the Right earbud and Pair the Right earbud by itself. This 2-Step process allows you to use the Left and Right earbud by itself, or together as a stereo pair.
Select and change the rubber ear tips that best fits your ear.
Insert the earbuds into your ear with the charging circuit on the top end and twist clockwise in the Left ear and counter-clockwise in your right ear to lock into place. The earbuds should feel snug inside your ears without falling out.