Tune your guitar with this plectrum

So, plectrums are not just for plucking strings of your guitar; now they've a different role to play, with a little trick. The charm of this tiny stroboscopic guitar tuner is that it allows you to tune your guitar while you're performing in the midst of the yelling crowd in a gig. How? Actually, it's packed with two multi-colored LED's that reflects the status of the strings. Simply pluck a string with StroboPick, shine the pick onto the string and tune until the colored lights appear stationary.

strobopick

Watch it in action here.

Via: guitarist-gear