Handy Mini massager:- Fashion design, modern design, attractive design, small exquisite, and convenient to be taken. And it can be used anytime and anywhere. Freely sliding in the whole body, and arbitrarily massaging any part like back, chest and leg etc. Helping users relax the whole body, ease nervous nerve, and promote blood circulation. The middle-aged and the old , The people who are suffering from Motility muscle strain. Work mainly for, the people who have been using computer for long time, The people who work on IT field, The people who do some high strength work and must suffer from working pressure. Power Supply: 3 * AAA batteries (not included) or via USB cable