You are watching a NEW mask ROM for the Roland U-20, Roland part 15209239. This is the last version of the firmware (V3.03) and it has many corrections and improvements,

This is a original NEW old stock part in mint condition. I still have a few. I do have thousands of NEW original parts from Roland. Contact if you are looking for something.

Shipping charges (registered) included to any part of the world. Shipped from EU.