AFTER-SALES SERVICE: Hottoerak infrared light lamp for face offer you 12 months of customer service. It is a considerate product for birthdays, celebrations, and any holiday. USAGE FREQUENCY: We suggest using it at least 3-4 times a week for 10-20 minutes each time. After 4-6 weeks of continuous use, it will bring improvement and unique enjoyment to your daily life (The effect may vary from person to person). TIMING FUNCTION: Our LED red light lamp for face has a timer setting of 10 20 30 minutes. Additionally, it offers adjustable brightness levels from L1 to L5, ensuring personalized comfort. PROTABLE DESIGN: The face red light is crafted from soft, sa-fe, and durable material, replacing the old-fashioned hard-shell masks. It features adjustable straps to fit all face shapes, and the eye pads protect the eyes without causing discomfort. COMBINATION MODES: The combination of 660nm red light and 850nm near-infrared light is the optimal wavelength combination for tre-atme-nt and can specifically target the face. TWO DRIVE METHOD: Hottoerak red light is two drive modes. One is plug and play, enabling immediate use without waiting for charging. The other is connecting to equipped mobile power source, allowing you to use the LED face lamp anytime and anywhere. You can select according to your needs.