This is a wireless MIDI keyboard from Korg. I purchased it used a few months ago and used it a few times, but I am selling it because I am upgrading to a keyboard with more keys. Operation has been confirmed. There are no noticeable stains or stickiness, but please understand that this is a used item before considering a purchase. I will wrap it in bubble wrap for shipping. This is a 25-key MIDI keyboard with wireless connectivity. - Model Name: microKEY Air - Brand: KORG - Features: Wireless connectivity - Number of Keys: 25 keys Thank you for looking.