Listen to music exactly as artists intended with the Shure AONIC FREE ergonomic earphones. They provide studio-quality, clear audio with deep bass powered by a premium amplifier and driver combination. Or customize the audio experience via the ShurePlus Play app to adjust custom multi-band EQ and presets. Moreover, these ergonomic earphones include a pocketable charging case that provides up to 21 hours of playtime for uninterrupted audio on the go. Hone into your music with Sound Isolating technology that blocks out background noise to eliminate distractions. Alternatively, switch to Environment mode to hear the outside world at the touch of a button. Finally, experience crystal-clear calls with beamforming microphones, which are placed for optimized clarity. Overall, use these buds for workouts, commutes, leisure time, and answering calls.