Life is often filled with unfair situations. Sometimes you have a beer but no bottle opener, a flashlight but no batteries, or a guitar without a tuner. The Strobe-e Keychain Tuner takes a huge leap towards making the world a better place by offering bottle opening, light casting, and tuning capabilities that fit in the palm of your hand.

To tune, the LED light flashes to the same frequency as a Low E string in tune and when you shine it on a Low E string that appears to be moving, just adjust the tension until it appears still. Once it looks like it's not moving the string is in tune.

This revolution in tuning/bottle opening technology sells for $9.99