Waldon Vibrating Yoga Wave Roller is a multifunctional massage equipment ideal for self-massage, balance training, and to get relief from back pain, knee pain, calf pain, shoulder pain, running injuries, muscle tightness & body aches. This low-density muscle roller is convenient to use and very effective in stretching strained muscles and penetrating the soft tissue layer of tired muscles. Features: Starts with 1 button Easy to use & clean 4 gear speed control function High capacity battery Nonslip design, can massage neck, back, leg & any part of the body Massager can give you a unique massage feeling Care: Please use the product according to the instructions Before using it please check the voltage Do not use this product while bathing Children and disabled people should not use it If you feel uncomfortable please do not use this product It is recommended to use it for less than 15 min each time Pregnant women and disabled people should only use it after consulting their doctors People with heart disease or other acute diseases must used this under the guidance of their doctor Do not use this machine when you feel unwell When starting the massage use low speed then gradually increase the intensity Press the power switch to start the product (default is speed 1) Keep pressing to change the speeds (till speed 4 which is the highest) Pressing again will stop the massager Additional Info: Model number: YC-618F Warranty: 12 months Dimensions: 15 x 11 x 37.5 cms Weight: 860 gms Includes: Massage roller, Charging adapter, Mesh cover, User manual Imported by: Passim Medichem Agencies, 186, Phase 2, IA, Chandigarh 160002 Voltage: Dc 9V Battery: 2000mah