Thank you very much for viewing. Please be sure to read my profile and product description thoroughly before commenting or making a purchase. I will not respond to questions that can be answered by reading the description, pointless template comments, or comments that clearly indicate the profile has not been read. Those with negative feedback in their purchase history will be declined, so please look elsewhere from the start. 49-key velocity-sensitive MIDI keyboard, USB connection possible. - Brand: Roland - Model: MIDI Keyboard - Number of Keys: 49 keys - Connection Type: USB connection - Features: Velocity-sensitive keys Includes the main unit and one MIDI connection cable. There is some stickiness on the rubber parts of the switches. Simple operation has been confirmed with dry cell batteries. I am not familiar with the details, so I have not checked the fine functions, and I am listing it as a junk item. It will be wrapped in air-packing and shipped in a suitable cardboard box. Thank you for viewing.