Really well too. I use my phone to play music while I am working, but ear phone cords are annoying, and without them it doesn't have the greatest sound, nor is it very loud. However, I saw somewhere on Facebook, no idea where, the idea of putting the phone into a glass to amplify it. I used this big measuring cup instead, and not only was it louder, but the bass was much richer, and the sound was improved all around. So easy. So effective.