Feature: Full innovation LED flash technology More approach natural light use high quality LED light Seven levels luminance, Warm color filter included Left and right flash function make the object appeared third dimension Seven different adapter ring: 52mm, 55mm, 58mm,62mm, 67mm, 72mm 77mm Specifications: Guide number: 18 Flash range: 5CM-2M Exposure time: 1/100 seconds Weight: 180g£¨Ring flash only£ Body Size: 191X77X60mm Lamp Size: 125X116X21mm Power supply: 4 AA alkaline batteries or AA NI-MH batteries LED lamp: 18 high-power LED lamps Color temperature: 3200-5500K Package includes: Ring flash(1) protecting bag(1) pedestal(1),specification(1) warranty card(1) adapter ring(7).