How To Use Foot Massager : 1. Attach the device to the foot mat. 2. You need to take off the socks when using this massager pad, then put two feet on the mat at the same time. (keep your feet dry) 3. Press the "+" or "-" buttons to power on or power off, or adjust the intensity level(1~19 levels). 4. Press the "M" button to switch modes between 1~8.