This equipment has been stored for a long time. It powers on, but the knobs are deteriorated or are substitutes, and the HDD and CD drive are also malfunctioning. Furthermore, there are no option boards, so please purchase this item only if you understand that it is being sold as junk for parts or other uses. Also, the internal battery needs to be replaced. Thank you. - Model: Yamaha AW4416 - Type: Digital Audio Workstation - Number of Tracks: 16 tracks - Features: Automation, Sampling - Display: Color Display - Controls: Fader Control - Connectors: Various input/output terminals - Operation Buttons: Multi-function buttons