... according to the specific characteristics of your shoulder, waist, joint,hand&foot, and leg, which makes effective therapy Technical parameters: •Power ... for 3 months, 15 minutes/day (operating impedance: 500Ω)•External Size: 150 *100*46mm•Weight: 200g/PC (not including dry batteries ... : Class II-BFAccessories:main machine,wire,electrodes pads,slipper, instruction manual,hand-bag