Fine product, especially for the price. Arrived almost overnight, nicely packaged. I purchased both this device and the large pad.Very nicely engineered, and 90% easy to use. The function of taking off the light pad and wrapping it around the treatment area is very convenient, since your hands are free to do other tasks. I returned it because I am a very seasoned citizen, and my achies need a stronger treament modality, i.e. laser tech. The replacement for this item, after serious research, is almost $4,000.00, since laser instruments are far more expensive. This item gave very nice temporary relief.