?QUALITY AFTER-SALES SERVICE?Sthmolepy red light offers you 60 days money back and 1 year free warranty. If you have any questions, please feel free to contact us. We will reply within 24 hours. ?RECOMMENDED USE FREQUENCY?Use 3-4 times a week, choose 10 15 20 minutes automatic timing. 4 to 6 weeks later, you can get improvement (due to individual differences, the result time is different, please continue to use). ?SOFT AND COMFORTABLE?The near infrared light is soft silicone and fits all shapes. Adjustable 3 straps make the red light face flexible and comfortable. ?2 DRIVING METHODS RED LIGHT?No need to wait for charging to use a red light mask at home, or you can connect the included mobile power. You can use it anytime and anywhere, convenient and economical. ?COMBINATION RED LIGHT LAMP?Red light Face is designed with a 3-in-1 chip, 660nm red light 850nm near-infrared light is more helpful.