Fender Strobe-E Keychain Tuner Introducing the ultimate musician's tool! The Fender strobe-e tuner is a single-note strobe tuner, flashlight and bottle opener The strobe-e works by shining the LED light, specially calibrated to the frequency of the low "E" string of your guitar or bass The second function is an incredibly bright LED flashlight for the next time you drop your pick onstage And finally, a bottle opener for opening your favorite cold beverage in Fender style! The Fender Strobe-e Keychain Tuner features an LED light that does double duty as a flashlight and a single-note strobe tuner Shine it on the low E string of your guitar or bass for tuning