40 levels of intensity-each output has 40 levels of intensity, especially the intensity of output "A" and "B" can be adjusted individually. This means that when you select a mode, you can set two different intensities. This device can meet your different body parts and pain and fatigue requirements to the greatest extent (generally, the output intensity of other brands must be the same). At the same time, you can adjust the time to 10-60 minutes (default time: 30 minutes).Reusable high-quality electrodes-these electrode pads are reusable and have a unique shape suitable for any part of the body.[Multiple levels and modes]: Twelve (12) high-frequency massage stimulation modes to help adapt to different muscle groups of your body; including back, knees, elbows, shoulders, hands, legs, feet, etc.[Designed for mobility:] Considering your lifestyle, our TENS pads are very soft and durable. They can be attached and attached to wherever you feel pain.Packing:(1) TENS machine(1) Suitcase(2) Output line(8) Electrode patch(1) User manual