How to Use 1. Distance: Position the face or body part within 0-30 cm from the LED Red Light. 2. Session Time: Choose the desired exposure time of 15min, 20min, or 25min.Repeat on other areas if desired. 3. Frequency: Repeat up to 3 times daily. Specification Model: HY-400W Material: ABS Color: White Plug: EU Standard Light Source: LED(80*5W) Power: 55±5%W Beam Angle: 30° Power Source: ‎Corded-electric Feature: Non-flicker Temperature: -10℃-40℃/14-104℉ Bracket Adjustable Angle: 90° Using Distance: 0-30cm/0-11.8in Timing Range: 1-30min Wavelength: 660nm:850nm=1:1 Irradiate Range: 3m²/32.3ft² Adaptor Input: 100-240V50/60HZ 1.5A Package Included 1* Lamp 1* Power Cord 1*Goggles 1*English User Manual.