Wide LED screen display, Flexible goose pipe design, Easy to adjust at any angle position, 1-20 mins adjustable timer, Convenient to use, High Uniformity of Light Output, Small base size design, 8 pieces high power LED with fan cooling, Easy to mount on chair, Wide LED screen display, Flexible arm , Works well on all types of stains – internal stains, tetracycline stains, flourosis, Convenient for use. High uniformity of light output. Small base size design, 5 wheels support, make the machine more stable, with lock wheel design, easy to fix. 8 pieces high power LED with fan cooling.