What are the common problems with smd led chip ? Common problems caused by improper power supply: a. Check if the power supply is working properly, and the indicator light is not lit. If it is not lit, please check if the power ...
LED Beauty Instrument - LED high-tech photon rejuvenation beauty instrument uses the principle of photodynamics to activate deep cells to make the skin better metabolism. After the light is absorbed by the skin, the light energy i...