1) First familiarize yourself with the differences between the hearbud shapes: Left (L), Right (R), Back, and Front (indicated by a raised spot next to the L or R symbol).

2) Before fitting to your in-ear pieces, experiment with each of the three sizes: 1, 2, or 3. Try them in each ear to find the best fit. It may be that your left and right ear fit different sizes. Remember, the raised spot always faces forward.

3) The hearbuds plugs should feel snug and secure without feeling too tight. Make sure you have them inserted correctly for comfort and performance.

4) Now take them off and push the open ends of your two chosen Left and Right hearbuds plugs over the corresponding earpiece.

5) Turn down the master volume on your hear back or music source, put the ear-pieces in your ears and adjust the volume to the desired level. You'll notice the difference immediately. (To remove, gently peel hearbuds from earpiece).