Battery instructions: When the battery is exhausted, you need to charge it for about 3 hours to fully charge. The single battery life of the machine varies from 0.5 to 3 hours depending on the preing force during use.When charging, the current battery level is displayed on the screen. When the battery level shows 99, the charging is completed. It is prohibited to use when charging for your safety. Use tutorial: Please insert the maage head into the front hole of the machine before use. There are multiple maage heads that can be switched freely according to different packages. The deep penetrating power of the device can relieve pain caused by joint sprains, bursitis, muscle spasms, neuralgia and other skeletal muscle diseases in a short time. Almost all soft tiue diseases are related to trauma, overuse of muscles or abnormal posture. When using the device, avoid exceive preure and prolonged physiotherapy, and also avoid sensitive areas, such as the head, face, and cervical spine. If inflammation, swelling or pain worsens, stop using it immediately. Indications (Applicable to) 1. Pain and spasm due to muscle contusions, sprains, strains and injuries. 2. 2. To aid the flow of edema fluid from swollen areas. 3. Relaxation, thickening of connective tiue and fascia. 4. Reduce the accumulation of lactic acid in the muscles. 5. Increases joint mobility. 6. Eliminate muscle fatigue. Contraindications (not applicable) 1. Aneurysm, bleeding, use of blood thinners. 2. Heart disease, pacemakers or defibrillators. 3. Pregnancy, cancer. 4. Intra-articular fixation within 90 days, the device should not be used within 3 inches of the internal fixation. 5. Sensitive areas: head, face, cervical spine, spinal vertebrae. 6. Areas near bones with le muscle coverage: tibia, back of the foot, back of the hand, etc.