Don't waste your money on "Fast-Abs". I ordered it from tvinetnions.com and what a disappointment. The unit itself is very cheaply made and the power unit on my system does not go past the level of 5 (I've also used AbTronics so I know how powerful the electro-waves can be). When I try to call the 800 customer service number all I get is a busy signal. The cost was 49.90 with shipping. I'm going to try and return it but they did not include a packing invoice so wish me luck.