Interesting that they say $39.95, with the standard "but wait, buy another and get XXXX free" and the default is with the extra 2 feet of cable and the two-fer, for the low, low price of $95.95.
Just the one with 4' cable for $40 isn't a bad deal, as it's a standalone product. No need for a cell phone or laptop to hook up to it wirelessly.
