How do I tell the difference between R4 Mk1 and R4i (Mk2)?

This answer applies to:

  • R4i Mk2

Visually R4 and R4i are identical but if the serial number on the rear of the unit, has a lower case ‘i’ on the end, this indicates that the product is of R4i specification with DAB+ capabilities and other technical enhancements. All R4’s manufactured from September 2010 have been of R4i specification.

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