I purchased this on Mercari but am selling it because I couldn't handle it. There are the same photos on Mercari, but please be assured. The following text is a copy: I haven't used it much, but while it was stored in the box, the keys have discolored, and the knobs are a bit sticky. I will ship it in the box. [Manufacturer's Description] The A-500PRO is a MIDI keyboard controller equipped with a high-performance keyboard that pursues expressive performance and a wealth of controls such as knobs and sliders. It combines high playability and real-time controller functionality, making it useful for music production with DAW software as well as real-time performances such as live shows. [Main Specifications] ● Keyboard: 49 keys ● Front Panel: Velocity, Channel Aftertouch compatible controller pads, buttons, knobs, sliders, foot pedal, bender lever, keyboard aftertouch, value encoder knobs, display 16x2 character display (with back light) ● Side Panel: Power switch (USB BUS/OFF/DC IN), MIDI merge switch (ON/OFF) connection terminals, hold pedal terminal (standard type), expression pedal terminal (TRS standard type), MIDI in/out terminals, USB terminal, DC IN terminal Power: DC9V (AC adapter) or USB bus power. ● External Dimensions / Weight: Width (W) 839 mm, Depth (D) 251 mm, Height (H) 91 mm, Weight 3.8 kg