This is a KORG ER-1. There are traces of labels stuck on the body. Through a basic check, it powers on and produces sound, but there seems to be a problem with the sound memory function; sometimes, the created sounds cannot be saved. Also, the stereo output is unstable, and it only outputs in mono, or requires using the headphone output. Due to these issues, this item is considered junk and is sold as-is, with no returns or claims accepted. AC adapter is not included. - Output terminals: Mono output, Audio input 1 & 2 - MIDI terminals: MIDI IN/OUT/THRU - Number of patterns: 16 patterns - Effects: Built-in effects Thank you for viewing.