Feature: 1. Four Speed: The muscle massager uses smart chip, which has four level speed to meet different massage needs. 2. Different Massage Heads: Contains 4 massage heads of different shapes, easy to replace, suitable for massage of different parts. 3. Type‑C Charging Port: Type‑C charging port, which can be directly charged by mobile phone charger and power bank. 4. Ergonomic Design: Ergonomic design, no edges and corners, delicate and comfortable hand touch feeling, and more anti slip. 5. Wide range of Applications: This massager is suitable for people with muscle stiffness, shoulder strain, muscle stiffness and obesity. Specification: Item Type: Muscle Massager Material: ABS + Aluminum Alloy Size (include ball head): Approx. 15 x 14 x 4.5cm/5.9 x 5.5 x 1.8in Power Supply Mode: Lithium battery, 2600mAh (built-in) Applicable People: Muscle stiffness, shoulder strain, body obesity Adapted Parts of Each Massage Head: Ball Head: The force and thrust of the ball are uniform and soft, suitable for massage and relaxation of the waist, abdomen, buttocks, and legs. Flat Head: Suitable for deep stimulation of large muscle groups, legs, buttocks, etc. U Shaped Head: Suitable for massaging the neck, spine and achilles tendon. Cylindrical Head: Suitable for the meridians, soles, palm, achilles tendon and the rhomboid muscles of the back. Indications: Pain and cramps caused by muscle injuries, sprains, strains. Helping Ed Maverly's mobility in the Swollen area. Loose and thickened connective tissue and fascia. Reduce the accumulation of lactic acid in muscles. Increase joint range of motion. Eliminate muscle fatigue. Contraindications: Aneurysm, bleeding, use of blood thinners. Heart disease with a pacemaker or defibrillator. Pregnancy, cancer. Do not use the device within 3 inches of the internal fixation within 90 days of the internal fixation. Sensitive parts: head, face, cervical spine, spine. Places that are close to the bones and have a small muscle coverage: shins, insteps, backs of hands.. Package List: 1 x Muscle Massager4 x Massager Head1 x English Manual1 x USB Charging Cable