package list 1 x main device 1 x foot mat 1 x usb charging cable 1 x user manual features stimulates the muscles of the feet through low frequency electrical pulse technology promotes blood circulation and relaxes the feet. different levels of frequency and intensity to accommodate everyone's needs. durable silicone foot pad with conductive surface. easy to operate. intelligent power off protection, safe and convenient for use. lightweight and portable, massage your feet anytime, anywhere. 6 modes to meet your different massage needs the massager has a total of 9 levels of strength. if you can't feel it, it is recommended to adjust to the strongest level to feel it. in addition, it is best to stand up at the beginning, let it feel some weight, and then give it a few minutes to start working. note: not to use if you have a pace maker or high blood pressure.