Description: Built-in lithium-ion battery and USB cable, get rid of endless battery replacement. The machine's exercise intensity is 50% higher than that of battery-powered products. For better results, apply for 20 minutes, 1-2 times a day, for over 6 weeks. This muscle toner helps tone, tighten and strengthen body muscles such as the abdominals, arms and legs. It is ultra-light, ultra-thin, wearable and easy to carry. Ergonomically designed to target abdominal muscles. Attach fitness equipment to the location where you want to build muscle. To turn on, please press the "+" button for 3 seconds; to turn off the power, press the "-" button for 3 seconds. Fitness anytime, anywhere. Main material Main body: PET resin Gel pad: Polyacrylamide Glycerin Remote control: ABS resin EMS Device: Rechargeable Power Input: 100-240V, 50/60Hz Specifications: Fitness, Abdominal Muscles, Strengthening and Tightening of Muscles Electromagnetic pulses help firm and define your core by enhancing muscle contractions Electrical Muscle Stimulation (EMS) technology uses Original training pulse design with specific current frequency Effective training method for exercising muscles Package includes: 3*Controller 1*Abdominal patch 2*Arm sticker 1*USB charging cable 1*Instruction manual Note: Do not drive or operate machines Use with caution. Pregnant women and those with skin allergies should use with caution. Not suitable for men with auxiliary medical equipment, such as pacemakers, etc. Due to differences between different monitors, the picture may not reflect the actual color of the item. Please compare the detailed dimensions with yours For comparison, please allow 1-3cm error due to manual measurement. If there is a problem with the product, please leave a message before giving a negative review. Thank you for your help