steve2151
500+ Head-Fier
- Joined
- Aug 7, 2011
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Mine has the serial number (NK10----) in blue on the inside of the left earpiece and in red on the right. It's a bit hard to read against the gold flakes and amber, but it's almost impossible to confuse left/right on a CIEM anyway.
I think different colored ear canals are also an option if you really want it to be obvious.
I think different colored ear canals are also an option if you really want it to be obvious.