?????Working Principle?: IPL Hair Removal System uses Intense Pulsed Light which absorbed by melanin in hair follicle, producing photothermal effect and risies the temperature of melanin rapidly and decomposing it; ?????2 Different Modes?: The manual mode (flash mode) is mainly used for small area hair removal, such as bikini line, armpit, lips; auto mode (slide mode) can be used for large hair removal area, such as legs, stomach and back; ?????5 Energy Levels?: From 1 (lowest) to 5 (highest) can be adjustable, please choose the level according to your needs. The higher level,the greater strength,the better effect of hair removal (For the first use, recommended use level 1); ?????Applicable Skin&Hair Color?: As with any hair removal, the intense pulsed light hair removal systemis NOT effective on blonde, red or white grey hair. In addition, this product is NOT suitable for dark or black skin; ?????Quality Assurance?: We promise that our products are made of high quality. If you have any questions, please feel free to contact us and we will provide professional technology team to service for you.