metronomes - wwbw.com
The Korg MA30 is the latest offering
form Korg's innovative line of metronomes, with new features like
volume control and sophisticated rhythms such as triplets and
quadruplets with inner beats omitted. 
The Matrix metronomes are highly accurate, loud enough to hear while playing and
most importantly . . . affordable. The MR600 boasts many features not even found
on more expensive metronomes.
Much louder than competing models. Comes with convenient fold out
stand. Pocket size Quartz digital metronome. Louder than competing
models. "Bouncing Ball" visual teaches rhythm. 2/4, 3/4 or 4/4 time.
Accent beat. 40-250 beats per minute. A440 tuning tone. Battery
included.