Support ETTL Flash. Support FEC, FEB, front and rear-curtain sync, FE lock, modeling light, for Canon camera menu accessible. Support flash ratio adjustment, there are 8 levels (1/128-1/1) for intensity adjustment for flash control, total 22 levels for fine adjustment; Tube A and tube B can flash individually, the flash index is wider and more convenient. * The flash coverage Vertical angle: upward, downward 90 degrees Horizontal angle: inward 60 degrees, outward 30 degrees The degree of rotation of the adapter ring: upward 50 degrees , downward 30 degrees The flash tube can be installed on the tripod for use. * Ultra-fast charging recycling system It only takes 3 seconds to full output. Even if you don't use the new batteries, it only takes 4-5 seconds to recycle; * C.Fn custom function setting You can customize the function as you need through the custom function. * LED Focus Assist Light The LED focus assist light is divided into low-light and focus mode, enabling fast and accurate focusing. * Equipped with PC synchronous interface The YN24EX is equipped with a standard PC synchronous interface which allows you to easily operate synchronous flash by using the PC synchronous line. * Support multiple filter size lens Support the following filter size lens: 52mm.58mm.67mm.72mm. *Low battery reminder function When the battery power is insufficient, the red light flashes, which reminds you to replace the battery in time. * System Sound Prompt When the sound prompt system is on, different sound modes will indicate different working conditions of the speedlite to let you focus on the shooting process (Note: Sound can be turned off). * Equipped with external power socket YN-24EX comes with an external power socket to meet your higher demand for recycling time and never miss the wonderful moments again. * Auto-saving settings YN-24EX can automatically save your current operating settings to facilitate your next use. Specification: Circuit Design Insulated Gate Bipolar Transistor (IGBT) Type-auto macro flash for close-up photography Flash ratio control dual flash heads: 24/79, single flash head: 26/85 (ISO 100 105mm ) Flash coverage vertical angle: upward, downward 90 degrees Horizontal angle: inward 60 degrees, outward 30 degrees The degree of rotation of the adapter ring: upward 50 degrees , downward 30 degrees Guide No. With the accuracy of 1/2 EV in the range of 8:1 - 1:1 - 1:8 Flash ModeTTL M Recycle timeapprox 3s Power supply 4 aasize batteries (alkaline or Ni-MH are usable) Lighting duration 200 ~ 2500 times (AA alkaline battery used) Recycling time about 3s (AA alkaline battery used) Color temperature5600k Flash duration 1/200s ~ 1/20000s Flash control 8 levels flash control output (1/128 ~ 1/1), 22 levels of fine adjustment External interface shoe, PC port and charging port e xternal LED Color temperatureApporx. 5500K LED Luminance: approx. 300lux(1m) Net weight998g Compatible with: For Canon 1Dx, 1Ds series, 1D series, 5DIII, 5DII, 7DII 5D, 6D, 7D, 80D, 70D, 60D, 50D, 40D, 30D, 20D, 750D 700D, 650D/T4i , 600D/T3i, 550D/T2i, 500D/T1i, 450D/Xsi, 400D/Xti, 350D, 100D, 1100D, 1000D, 1200D Package including: 1 x Yongnuo YN24EX Macro Flash Ring 4 x Adapter Rings (52mm, 58mm , 67mm, 72mm) 1 x Moung Ring 1 x User Manual 1 x Original Protective Box