Professional Grade Low Frequency Ultrasound with LED is an at-home treatment for skin tightening and wrinkle smoothing from the plumping effect of Ultrasound vibrating at 90,000 waves per second to activate skin metabolism and regenerate skin cells. Output is the same frequency as a laser device but the energy is low so it does not damage the skin like the heat from a laser. Time Master PRO works as the ultrasound waves cause a vibration of the surrounding skin tissues, known as "cascade of inter-cellular communication." It strengthens and lifts. As you move the device your skin will feel tighter, almost immediately. As you pass the treated area, and throughout this process, oxygen to the cells increases and removes wastes in the pores. The non-thermal (no heat) action of ultrasound is beneficial because of the rapid oscillation of tissue promotes movement between inner and outer cells and increases fibroblast activity necessary for increased collagen formation. The device should not be used if you have dental implants and/or heart pacer. For best results please refer to instruction widely available on line.