Ring-flash design for versatile lighting when shooting close-up Quick and easy to use: controllable from camera or flash LED modelling lamps make composition and focusing easier Independently variable dual flash tubes for creative lighting control Powerful performance with guide number 14 (ISO 100,m) A high performance Macrolite flash delivering creative lighting solutions for photographers shooting close-up images, both on location and in the studio. Features Camera brands compatibility Canon Flash guide number 14 m Channels quantity 4 channels Group settings 3 Auto Focus (AF) assist beam No Flash modes Second curtain synchro Brand specific flash systems E-TTL I (Canon), E-TTL II (Canon), TTL Wireless connection Yes Material Metal Approximate recycling time 5.5 s Product colour Black, White Power Battery type AA Number of batteries supported 4 Power supply type CP-E4 Weight & dimensions Weight 455 g