Casio ModelSK-5 Sampling Electronic Keyboard Pulse Code Modulation PCM USED Tested!This Casio SK-5 is in great condition witha few scuffs and scrapes from storage. The keyboard has been tested and all keys, buttons and drum pads work great. Battery compartment shows no corrosion or rust and battery cover is included. The Keyboard has only been tested with batteries do not have an power adapter to check AC plugin. Feel free to contact me with questions, I have sold a lot of keyboards on eBay in the past year and this is one of my favorites.