I have been using ending for one year. It is blue plastic, it beats the time and position (you can change the format of the measures and the tempo, what is more normal for a mtronome) it has a headphone output that allows you to walk by listening to the tic tic tic tac or the bus to pass the time. It can also make sounds to grant a guitar "ear" more easily. It features an LCD display.
In short, it is very well and not too expensive, the only snag is the sound quite as nerve trs strident (even if the volume is adjustable HP)