Back Massager - Handheld and Powerful Wand - 8 Speeds 20 Patterns - Magic Recovery Effect for Women and Men, Body, Neck, Back & ShouldersChristmas and Halloween gifts

Personal massagers operate on a simple principle of converted energy. they utilize a small motor spinning an eccentric rotating mass (ERM). The resulting off-balance spinning mass wobbles the massager which creates the vibration. Three factors primarily determine the intensity and resonance of the vibration. 1. Motor power - 110v is enough to power a good sized motor. 2. Weight of the eccentric rotating mass. Heavier weight, deeper and more intense vibe. 3. Offset distance between the weight and the motor. The longer the shaft, the bigger the buzz. A real Hitachi magic wand has a powerful motor set into the body of the device with a lengthy shaft protruding through to the head and an above average sized ERM. This wand has a poorly assembled circuit board which immediately converts the 110v power into a much smaller voltage so that it doesn't immediately fry the tiny two-speed motor which is tucked into the head along with the ERM. It looks and functions like the much cheaper personal massagers you see while pretending to be a legitimate magic wand. Don't waste your money. I know this for certain because mine fried the day after the return period expired so I disassembled the device and repaired the burnt up wire so that I could give it to my wife, but this thing can't touch my back pain and I've had to bite the bullet on a premium massager like I should have done in the first place.