This is an cool piece of 80's Yamaha Gear This drum machine/digital rhythm programmer has awesome old school drum sounds and easy to use with midi in/out and 1/4" inputs as well. Everything works except one of the drum pad buttons on the front. It can be triggered using a midi controller / laptop so I have not had issues with the button not working. Make this machine yours and make some old school beats! sold as is Priced accordingly. here's a link i found to the manual online: https://jp.yamaha.com/files/download/other_assets/2/317282/RX15E1.PDF swing by and check it out!