lleviate ache caused by tiredness and rheumatism Clean away tic on the shoulder caused by uncomfortable sleeping Alleviate ache caused by uncomfortable blood circulation Outer-package size:43 x 13 x 11 cm about Massage stick length: 38 centimeters The total weight: 0.28 kilograms; Frequency: 50-60HZ Vibration frequency: minimum 2600 R.P.M., highest 3,200 R.P.M. Power supply: Exchange 220V