1. Material: ABS +PU 2. Product principle: EMS low frequency pulse 3. Battery capacity: 150mAh 4. Range of use: fitness exercise, muscle massage, muscle relaxation. Suitable for arm, waist and leg muscle training 5. The product is USB rechargeable, easy to operate 6. 1-2 times a day, train every 25 minutes to exercise muscles and tighten 7. Easy to carry, exercise abdominal muscles anytime and anywhere 8. The physical massage principle of electronic acupuncture, using low-frequency pulses, imitating the 6 basic techniques of acupuncture massage, 10 levels of massage intensity can be adjusted