Be sure to add me to your favorites list Genuine Roland, NEW! Never Used Condition Model ACK-120 AC Adapter Power Supply for EP-9, JV-50, ep-7 MKII, JW-50, MV-30, W-50, CM-300, CM-500, ep-707, MT-200, PR-300, and Possibly Others, 9.5V 1500mA This is a copletely unused, new old stock condition heavy duty Roland AC adapter / power supply. It's new, just without it's packaging. The model is ACK-120, for use with several Roland synthesizers and other instruments (see below) that need this power requirement. This is a GENUINE Roland power adapter made in Japan, and it's in brand new condition! Manufacturer: Roland Model: ACK-120 For use with electronic musical instruments Input: AC 120V 60Hz 30W Output: DC 9.5V 1500mA, with negative (-) polarity tip barrel type plug This is the original model power supply that is used for the: Roland CM-300 and CM-500 desktop synths, the Roland ep-7 mkII digital piano, the ep-9 and ep-707 electronic pianos also by Roland, the JW-50 music workstation, the MT-200, MV-30, and PR-300 Roland sequencers, and the Roland JV-50 and W-50 synthesizer keyboards. There may be other older models that accept this same power supply as well, such as the A-30 midi controller and possibly others. Check the info on your Roland, and please make sure before you purchase. Thank you for looking! Check out my Store!