I use these two mics for a program called "Ultra Star", which is very similar to SingStar. On Windows computers and on Mac (iMac and Macbook) is "Plug & Play" is announced simple, so just plug in via USB (2.0) and loss Willingen!
Reach and latency super, all runs just as smooth and without delay as the cable-heavy variant.
The price is therefore perfectly fine. You get a good product, which cuts a fine figure outside the PlayStation.