49-key MIDI keyboard, USB connection compatible. - Brand: Roland - Model Name: A-500S - Connectivity: USB MIDI - Features: Velocity-sensitive - Controls: Expression pedal compatible - Number of Keys: 49 keys This is a Roland MIDI keyboard (49 keys). I am selling it to organize my equipment. I bought it used, but I didn't use it much, so I'm selling it! There are some minor scratches and signs of use, but there are no problems with the operation. It doesn't have a box, so I will ship it in something else. Keyboard Synthesizer