Shake Weight is a hand held device that requires no batteries. You simply follow the products DVD to learn what exercises you can do and for how long to do them for. The whole concept is to tone your body while reducing fat and flab at the same time in as little as 6 minutes everyday.
The advantages of having a Shake Weight is that you can do the exercises in the privacy of your own home. It doesn’t require heavy lifting. Over time, it will be like using a 60lbs weight which for most is a lot. You are not going to become some huge musclebound person by using this device. That is not its intent. If you want to build large amounts of muscle, go to a gym and workout regularly. If you want a shapely toned body, than Shake Weight is the device you want.