Input: A.C 110V/60HZ Power: 20W Measurement: 772x464x460mm Quantity: 20pcs /carton Gross weight: 19.20kgs This product is a pounding type massager. It can fulfill two functions of pounding and massaging. There are two steps of "quick" and "slow" pounding speed for your choice. It internally sets the eletric heating protection device. It is of the light, handy and novel structure. It can becarried by the user to implement massage to various positios in the human body. It needs no help from the others. The product is allocated with three pounding heads. The user can inter-convert them in use according to the special requirements.