I be so excited to buy the Shake Weight after see all those commercial , but now I see why I dont know anybody who own this piecce of junk . I think that it be a battery operate system that move automatically but its not . it suck and be make of plastic . three word people DENISE AUSITN WORKOUT , she have several workout dvd and you can go to target or walmart or where ever and get some 5.00 weight . the only good experience be that I be receive my refund very quick . but I be smart enough to buy that Denise Austin cardio workout dvd in the same order as this shakeweight and im very pleased with it . people , once again dont waste you money on this trash .