It's called the L1.
We rent it out for events, bands, and other functions.
It's a line-array. Similar to JBL's Vertec on a smaller scale.
It's not feedback proof, it's just more resistant. It's like holding the mic 1 foot farther away (compared to a regular point source speaker)
It's not new technology, Bose is just the first to make it this small. All line-arrays behave the same way. Anchor Audio made one too, but I heard it and it sounds horrible.
**added** sounds much better when used with Shure's Beta series. The higher sensitivity of the Beta mics allow for lower gain settings on the trim on the L1 base.
I suggest joining the L1 forums on the Bose website. Or just read through... musicians, and well as DJs use it.
***another PS*** OMG, baldo, I'm surprised those guys at Sam Ash knew how to handle the L1... I checked it out at GC before, and OMG... if I was to base my purchase on that demo, hahahaha... the system was sooo noisy (turned out to be their outboard rack in the store... the XLR cables were old and cracking already and would pick up the flourescent lights) plus they had really bad CDs to test it with... all they had were some employees homemade demos which were like some low bitrate MP3.
For those interested in the system, just ask me.