M-Audio Axiom 49 Keyboard-USB Power.  M-Audio Axiom 49-Key USB Keyboard MIDI Controller with USB and Power Adapter. 3 sliders are missing knobs but does not impact ability to move/set sliders, as it shown in the picture.  Approximately 32" wide X 11 deep X 2 3/4" tall.

See pictures and description for details and condition. Please look carefully at the pictures and if you have any questions, don't hesitate to contact me to clarify any potential concerns regarding condition or grading in advance. Yardstick not included.