SEIKO SAT800
One of the best digital tuners that I've found for tuning harmonicas and perfecting/practicing bends is the SEIKO SAT800. It has a backlight if needed for dark seedy venues or playing in the wee hours of the night. Also will play back the note, tells you the exact +/- of cent (rather than guessing an approximation based on a needle), is super durable (aluminum and rubberized). It's also the most stable needle I've found for digital tuners. It's almost if not just as stable as my analog SEIKO ST-909 -and it uses AAA batteries instead of the 9V found in the analog tuner. Top it off with the retroey aluminum look. Definately replacing this with my KORG. DON'T FORGET TO SET YOUR TUNERS TO 442!!!!! I made the mistake of leaving them at 440 for the first two years.
-Taylor
$25 here when in stock http://rockinronsmusicsd.com/index.php?_a=category&cat_id=50