Features:The Macro Ring Flash can produce a ring of light that reduces shadow which is excellent for taking macro shots. The Flash tube is mounted in front of your lens producing light that wrap around the objects. 7 adaptor ring is included to enable flashlight to couple with lens. Specification:Type: Close-up Guide No.: 14/46(ISO100, in meter/feet) Effective Distance: Approx. 20cm-5m Color temperature: 5500K Flash coverage: 80° degrees in either direction Firing configuration: Two flash tubes can be fired together or single Flash ratio control: 1:8~1:1~8:1 in 1/2-stop increments Flash exposure compensation: Manual, FBE: in. 1/3-stop increments Flash exposure confirmation: Flash exposure confirmation lamp lights AF Assist Lamp: Approx.40° top and bottom and 45° left and rights/On time: Approx. 12sec. Recycling time: Approx. 0.1~5sec. Supply battery: 4XAA/LR6 alkaline batteries Battery life: Approx. 100~800 flashes(with AA/LR6 alkaline batteries) External power source: Compact battery pack CP-E4 Package contents: 1 x Macro Ring Flash Light8 x Adapter ring1 x carrying bag1x Instruction Manual