Nissin Di866 Mark II professional digital flash. The advanced flagship model with GN60 power. It is Canon E-TTL/E-TTL II comparable with sub-flash in GN12. The auto Zoom covered 24~105mm and light diffuser panel covers to 18mm in full frame. Also built in fill-in reflector. The Di866 Mark II Wireless TTL system support Canon wireless TTL system. Di866 Mark II can be used jointly with Canon original flash as either Master and Remote (Slave). The Di866 Mark II also supports digital (pre-flash system) and analogue (film type camera’s flash and/or studio flash under both of Manual and Av. priority mode. Multi-Flash: Repeating flash for multi-exposure image in one frame. The power ratio can be set from 1/8 to 1/128. External Power Pack Socket – Di866 Mark II supports Nissin Power Pack PS 300. X terminal – Di866 Mark II has X-terminal socket for flash synchronization. USB Service Port – Di866 Mark II provides a USB port to update the latest firmware.