The Dell Flat Panel Attached Speaker is a two channel system designed to mount on Dell UltraSharp flat panels. Located on the stereo speakers are: a rotary volume with on/off control to adjust the overall system level; a white LED for power indication, dual audio headphone jacks and a Kensington lock tab for security. AX510 is for UltraSharp and select other models with a Soundbar power pass-through connector.