See it
here on the Peterson web site. It is now discontinued because it has been superceded by the Stroboclip HD.
I paid 68 euros for it from Thomann 5 years ago. However, I take a bottom E from the keyboard and then tune by ear so I still haven't used it.
Asking price: £30.
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Comments
I'll have to keep taking an A from my 45 year old tuning fork.