I've bought WST-523 clip tuner form local internet shop at about $11 including shipping.
http://www.cherubtechnology.com/epro....php?proid=222
Here is some specs.
Power: 3V 2032 cell battery
Tuning item: C, F, Bb, Eb, G(uitar), B(ass), V(iolin), Cu(Ukulele in C), Du(Ukulele in D) - C is chromatic tuner.
Flat key: b, bb
Range: A0(27.5Hz) - a3(1760Hz)
A4 range: 433 - 447Hz
Accuracy: +/- 5%

- My Korg DTR-1000 is +/- 1%
So far your average clip tuner.
But...
It has 3 different bright LCD color.
Orange: low
Green: in tune
Red: high
So you just need to look the color only when tuning.
Tuning accuray is not the best, but response time is as good as my Korg DTR-1000 rack tuner.
Not the sexist looking clip tuner in the market, but at $11 including sh/h, I'm very satisfied.
Because it uses vibration of instrument itself, you can tune your bass at 0 volume or not plugged
I've bought this tuner as the present for my guitardist who NEVER tunes his axe during rehearsal, but my mind is changing