Wittner MT-40 : l'nono's user review
A small electronic metronome credit card size. Not so many frills: choice of tempo (30 to 250), measurement (up to seven times with only one high point) or rhythmic figure (two eighth notes, triplet or four sixteenth notes), silent mode, mode pitch (gives the 440) headphone mini-jack format. There is no coffee, or even measures a little complicated (no management of the highlights / low / intermediate), but it sets the tempo and I have not wanted to throw it against the wall after 10 minutes, which is a quality to a metronome. Weakness: no volume control on the headphone output.