Features: This technology penetrates the muscle tissue directly offering exercise with little or no movement. It causes no harm to the body and just lets you enjoy healthy fitness with minimal exercise. It can be used on the waist, legs, thighs, arms and abdominal muscles for exercising. It helps you gain tighter muscles and a perfect figure. The fitness equipment host will be implemented all functions required for operation of the collection together. ABS gel pad and fitness equipment host can be disassembled. Device is most effective if gel-pad is flattened when in use. Power: 2*AAA Battery(not included) Frequency: 1-100HZ Using mode: 6 modes Working time: 12 mins Output: 9.8mA Specifications: Material: ABS Color: black&orange Abdominal Muscle Trainer Size: 21*10*2.3cm Host Size: 12*10cm Package Included: 1 x Abdominal Muscle Trainer 2 x Arm Trainer 3 x Host Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Due to different personal measuring techniques, there might be 1-7cm error of the physical. Thank you