Its a Seiko SQ50-V Quartz Metronome. I got it off Amazon for about $20. [Looking about amazon it seems that the price has been upped.]
I really like it, it goes from 40-208bpm but doesn't have every single beat in between. It has a dial set up so all it takes is a quick twist to change up the tempo, no time lost.
It has two 'ticks', one that is very electronic sounding, the other is more like a clock's tock. With my bass plugged in I found that I couldn't make out the electronic sound out, but the tock worked great.
The volume on it was enough for young ears like mine, but I've heard reviews that it can be an issue for older users. I haven't used the head phone jack but it takes everyday music headphones. It has a red light that blinks along to beat but it's rather useless. [This isn't just my visual delays talking, reviewers agree.]
It also has a kickstand, but I've found it sets up on it's own; it runs on a D-Volt battery, which it actually comes with!
I really love that it also lists the Italian music types. [That is most defiantly, not its real name.]