From Douglas…

I often tell people, “Tuning your guitar properly shows respect for your audience” and this bright, little tuner makes it so easy to tune almost any instrument. I was a convert to the vibration-based tuners years ago. Trying to tune your guitar in a noisy coffeehouse with an acoustic-based turner was almost impossible, but this makes it very easy. I especially like the Snark as it is very bright and readable even in full daylight and it has more gradations in its indicator than my previous tuners. More gradations makes it easier to be spot-on with your tuning and show respect for everyone who might be listening to you play. I’d recommend buying one of these for all your musician friends.

Snark SN-5 Tuner for Guitar, Bass and Violin

 

 

Many other tuners from Amazon.com