This Macro LED Ring Flash is specially designed to use in the field of macro shot￡? scientific research￡? medical and personal photography in a very close distance shooting. <br> <br> <strong>Features:?</strong> <br> This Macro LED Ring Flash is specially designed to use in the field of macro shot￡? scientific research￡? medical and personal photography in a very close distance shooting. <br> The Flash tube is mounted in front of your lens producing light that wrap around the objects.? <br> High definition LCD display.? <br> The left flash and right flash function makes objects appear more dimensional.? <br> Support TTL￡? manual mode and repeating flash mode.? <br> Eight diameters of adapter rings: 40.5mm￡? 52mm￡? 55mm￡? 58mm￡? 62mm￡? 67mm￡? 72mm￡? 77mm.? <br> Compatible for Nikon DSLR. ? <br> <br> <strong>Specifications:?</strong> <br> Guide No.: 14/46(lSO100￡?in meter/feet)? <br> Effective Distance: Approx. 20cm-5m? <br> Color temperature: 5500K? <br> Flash coverage: 80??degrees in either direction? <br> Firing configuration: Two flash tubes can be fired together or single? <br> Flash ratio control: 1:8~1:1 ~8 in 1/2-stop increments? <br> Flash exposure compensation: Manual￡? FBE: lN 1/3-stop increments? <br> Flash exposure confirmation: Flash exposure confirmation lamp lights? <br> Focusing lamp range: Approx.40??top and bottom and 45?? left and rights? <br> On time: Approx. 20sec.? <br> Recycling timer: Approx.0.1~5sec.? <br> Supply battery: 4 * AA/LR6 alkaline batteries(battery not included)? <br> Battery life: Approx.100~800 flashes(with AA/LR6 alkaline batteries)? <br> External power source: Compact battery pack CP-E4? <br> Package size: 14.5 * 11 * 16.5cm / 5.7 * 4.3 * 6.5in? <br> Package weight: 598g / 1.32LB? <br> <br> <strong>Package List:?</strong> <br> 1 * Ring Flash? <br> 8 * Adapter Ring? <br> 1 * Bag? <br> 1 * User Manual(Chinese !#!amp!*! English)