holds controls for volume, bass and treble but has no on-board amplification

listen to the pronunciation of holds controls for volume, bass and treble but has no on-board amplification
الإنجليزية - الإنجليزية

تعريف holds controls for volume, bass and treble but has no on-board amplification في الإنجليزية الإنجليزية القاموس.

Holds controls for volume, bass and treble but has no on-board amplification
pre-amp