The Volta series is comprised of "three model lines of six product models" under the nomenclature. The Metro, The RoadKing and the X21 and can now be viewed at their newly-revamped website (note: the embedded video may not work well with Firefox so you may need to use Explorer). Specs are available for all the models there as well.
And speaking of specs, we were recently expressing some skepticism of the performance claims made by the head of EVC, Llc. In an interview with a CBS affiliate it was stated that the companies top-of-the-range Volta, presumably the X21 HP, could hit 175 mph. We've now heard back from the company's president, William Kent, who says of the statement, "Now I certainly meant to say 175 kilometers per hour, which is roughly 120 mph (108 mph to be exact) in the interview and have said as much to everyone who has asked." We suspect it may be that the "top speed" was calculated with pen and paper rather than on a long straight-a-way while wearing a helmet. It is hoped that, for the edification of our faithful readers, arrangements might be made for a few passes around a track somewhere to put the question to rest.
[Source: EVC, Llc]