Upgrade Abs Stimulator, Muscle Trainer Toner Abdominal Toning- Stimulating, Strength Training Device for Muscles/Abdomen/Arm/Leg - Wireless Portable to-Go - Sculpting at Gym, Home- Fitness Equipment, Unisex for Men and Women, USB Rechargeable Gear Features: 【EMS Fitness】 Widely used in the fitness industry, it is a fitness method that uses low-frequency currents in the range of 40HZ to 2500HZ that only act on the abdominal muscles to promote muscle movement. .
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