Portable active monitor speaker for great price. Mic/line switch, treble and bass pots, in/slave XLR connectors.
We use it(single one) as vocal and pc playback monitor in band with guitar and drums. It's more than enough for this purpose(50% of it's volume). Need to note, we have simple drum set, 15W guitar combo(not heavy metal with stacks of Marshalls).
For sub-bass frequencies one need obviously dedicated speaker. However, I can imagine the pair to be used for just vocals on outside gigs with nice volume reserve as well.
Would be nice to have also cover sleeve, too.
At the end we're considering to purchase another one, just to have a comfort of single monitor for me and the drummer.