Features： 1、REDUCE PAIN: TENS muscle massager helps reduce pain and muscle spasms caused by a variety of conditions, including arthritis, menstrual cramps, knee pain, neck pain, back pain, and sports injuries. 2、ACCURATE MASSAGE: Using digital technology to provide comprehensive physical treatment to the body, the physical factors required by the body are transformed into digital signals, which are precise and efficient. 3、RELIEVE FATIGUE: Muscle massager meets the various strength required, the whole body can be used for the neck, arms, calves, feet, to help the body relieve fatigue. 4、RELAXING MUSCLES: Electronic pulse massager helps treat back pain, arthritis or inflamed discs and joints, relieves shoulder tension and relaxes muscles. 5、USB RECHARGEABLE: Small size and light weight, helps you relax your muscles anytime and anywhere. USB rechargeable design, which is suitable for various USB power sources. Specification： Item Type: TENS Muscle Massager Material: ABS Battery Type: 200mAH lithium ion battery (built in) Scope of Application: Applicable to soft tissue injuries and lumbar muscle strain injury auxiliary treatment Applicable Parts: Neck, arms, calves, feet Package List： 1 x Pulse Massager 8 x Patch 1 x Instruction Manual 2 x Electrode Wire 1 x USB Cable