The Raspberry Pi has an on-board audio jack, which is super handy for all kinds of sound effects and speech, just plug and go! However, for when you want better audio for music playback, a USB audio card can greatly improve the sound quality and volume. That's because the on-board audio is generated by a PWM output and is minimally filtered.
• Wire Length: 139.7mm / 5.5"
• Audio Card Dimensions: 43.76mm / 1.72" x 23.19mm / 0.91" x 11.97mm / 0.47"