1The ring flash is mounted on the camera lens, the photos taken are more natural and more in line with the visual experience. 2Highquality LED lamp beads, the light is closer to natural light, not only a flash, but also a constantbright fill light. 3Equipped with 40.5mm/52mm/55mm/58mm/62mm/67mm/72mm/77mm adapter ring, compatible with multilens. 4Effective flash range is between 5cm1.5m/2.059.1in, meet different photograpy demands. 5With light weight, the ring light is easy to carry and is not taking up much space. Item Type:LensRingLight with Adapter Material: Plastic+Alloy Product Color: Black Weight: Approx. 400.0g/14.1oz Guide Number: 15 Effective Flash Range: 5CM-1.5M Color Temperature: 6800K Exposure Time: 1/100 second Battery: AA battery x4 (not included) How to use: 1. Install the corresponding adapter ring to the camera lens 2. The flash lamp holder is stuck on the lens through the adapter ring 3. Install 4 AA batteries(not included) to the flash controller part 4. The flash controller part is installed upperof the camera through the cold shoe port 5. Set the flash parameters, then you can shoot 1 x LensRingLight 1 xWarm Color Diffuser(Installed) 1 x40.5mmAdapter Ring 1 x 52mm Adapter Ring 1 x 55mm Adapter Ring 1 x58mmAdapter Ring 1 x 62mm Adapter Ring 1 x 67mm Adapter Ring 1 x 72mm Adapter Ring 1 x 77mm Adapter Ring 1 x Manual If not in use for a long time, please remove the battery