1. How many languages does the machine have? The machine displays two languages, Chinese and English. The instructions are also in Chinese and English. We also provide instructions for using electronic pictures in Russian and Spanish. 2. There are several lights, what effect does each light have? The seller answers: There are 4 lights, red light is used to repair damaged skin, blue light is used to lighten acne, calm skin and anti-inflammatory, orange light is used to brighten skin and reduce pigmentation, and color light is used to whiten and rejuvenate skin. 3. How to clean the machine? Do not use water to rinse the machine to avoid water ingress. It can be wiped clean with a wet towel or wet paper towel after use, and placed in a ventilated and dry place. 4. Can it be used every day? If you have sensitive skin, it is recommended that you use it 1 to 2 times a week. If you don't have sensitive skin, it is recommended to use it 3 times a week, each mode is best used for 3 to 5 minutes.