Specifications: The EWORLD electric massager helps to alleviate the pain and soreness caused due to muscle knots and stiff joints. It also helps the user to relax and be free of stress by providing a massage akin to a professional one right at home. Product use: 1.On/off - Press and hold the start key for three seconds.(Tap the switch for one second to display the battery level） - Press and hold the start key for three seconds to shut down 2.Force adjustment - The starting gear is first gear. - Click the start key once to increase one gear. - The maximum gear is Six gear. -Click the start key once in Six gear to change to first gear. Note: in order to protect bones and muscles, avoid long-term fixed-point massage, resulting in damage, close to open10 minutes to automatically stop the intelligent protection mode. Package Included: 1x massage gun 4x massage head 1x power charging cable 1x user manual Kindly Note: 1. Do not use the machine for a long time in the same area. 2. If you feel uncomfortable, please stop using it immediately. 3. For more instructions, please refer to the manual.