This seems to be of high end quality! From the fit done to the tech, supper easy to use with a separate power bank with screen, i think there 8 different colours 3 levels low mid high and a timer starting with 10 minutes i use that setting swapping from green to yellow, for example one day i’ll go 5 minutes green then last five red/nir both on mid day off the next day the. The following led mask session will be yellow 5 minutes then red/nir last 5 minutes. Thats my current method, im getting a gel face mask you put in the fridge, apply moisturiser then cooling mask for 5 to 10 minutes