E-X20: How do I know the serial number of this unit? January 16, 2026 06:34 Updated Follow *The E-X20 is distributed in limited countries/areas.See the barcode sticker on the bottom of the E-X20. The last seven digits, which is a combination of alpha-numeric characters and numbers, printed below the barcode is the serial number.The image below is an example of the E-X50. Related articles What is a free ROLAND / DW ACCOUNT and how do I get one? How do I find/enter my Serial Number? Roland Cloud: I can’t find my serial number! E-X20: Does it support half-pedaling? E-X20A: How do I know the serial number of this unit?