Canon Speedlite 320EX flash that includes a versatile LED lights on the front that can be used as a modeling light, the AF assist beam when shooting Live View, or to illuminate a nearby subject in low light for video recording. It will provide up to 4 hours of continuous illumination with AA batteries a full charge. ETTLdan ETTL 320EX is compatible IIyang using Type A EOS cameras, and has a guide number of 78.7 '/ 24m @ 100 ISO in 24mm.berat 9.7oz (275g).