Feature:1800-3200rpm high torque motor has the appropriate force for every stroke, the gentle vibration is soft and gentle, penetrates deep into the muscles and provides a comfortable and pleasant feeling. 4 Interchangeable Massage Heads: Percussion The massager is equipped with 4 different shaped massage heads, which can help users relax different muscle tissues. For example: large muscle groups, deep tissue massage, muscle relaxation, neck, spine and back massage, relaxation of small muscles or massage of calf or arm muscles, back, arms, legs, vertebrae and muscle pain or quickly relieved muscle fatigue can also help patients. There is muscle wasting. It can penetrate 6mm deep muscle groups, quickly defeat lactic acid produced after exercise and give you a comfortable experience to hit the body deeply. The strong vibration of our Deep Tissue Massager can relieve pain, wake up muscles throughout the body, trigger the rapid release of myofascial fascia, and improve the body's ability to regenerate cells and repair itself. Name: Electric Muscle Massager Motor Type: Brush Motor Speed: 1800-3200rpm Battery capacity: 1800 mAh Engine revolutions: 1800 - 3200 Charging time: about 2.5-3 hours Voltage: 7.4V Massage head: 4 Smart type: Overheating protection Massage Technique: Impact Package includes: 1 x tape gun. Head massage * 4 1 x manual