Features and specifications: 1) Massage every points of the body and stimulate the veins 2) Improve the blood circulation 3) Smooth away the pains in the loins and back and relieve the fatigue 4) Adjust the metabolism and come to the equilibrium 5) Portable design, convenient, practical, caters to your necessity in your home, office and travel 6) Power supply: 2pcs of large-size dry-battery 7) Safe 8) Electricity saving, 6 hours' continuous using with 2pcs of large-size dry battery 9) Input voltage: AC 3V 10) Power: 3W Inner packing: Gift box dimensions: 37 x 35 x 12cm Outer packing: 20pcs/ctn Carton dimensions: 65 x 32 x 62cm