This profession RF550 Series LED Ring Flash is specially designed to use in the field of macroshot scientific research medical and personal photography in a very close distance shooting. It can provide continuous and stable semi light or full right to meet higher photograph needs. RF-550E series macro ring flash led light 48 pieces LED Visual LCD display with high definition 8*Adapter rings Color :Black Guide Number:15 Effective Distance :5cm-150cm Sync Speed :1/100S Power Rate: Semi Power Full Power Power :4 pieces AA batteries LED :48PCS Color Temperature :3000k-15000k Features: Visual LCD display with high definition. 2. Consist of 48 pieces LED higher luminance and lower static power consumption. 3. The left flash and right flash function makes objects appear more dimensional. 4. High-quality LED light close to natural light seven levels of luminance status to meet higher photograph needs 5. The ring flash can be mounted on a camera as photography light. 6. It is designed and molded on the basis of ergonomics for the convenience of reading and operation. 7. Eight diameters of adapter rings for alternative use 49mm52mm55mm58mm62mm67mm72mm77mm 8.Four colors of flash diffusers for alternative use. orange blue oyster white and transparent. Suitable for: For Sony DSLR Cameras(besides for Sony A58) Packing content: 1xMacro ring head 1xPower control with LCD display 1x Adapter rings (49mm52mm55mm58mm62mm67mm72mm77mm) 4xFlash diffusers (orange blue oyster white and transparent)