Bowens XMTR Nikon TTL Remote Complete Control at your Fingertips The XMTR is a TTL & High-Speed Sync compatible radio control & trigger system which operates on the worldwide 2.4 G Hz frequency. This is the Nikon compatible version. All main features & functions of the XMT including flash modes, power output & modelling can all be set from your camera’s position. The XMTR also allows individual control over separate groups alongside proportional control over all groups. A host of creative lighting features such as rear curtain sync, sync delay, & full control over strobe function settings, enable photographers to create inspired lighting set-ups at the press of a button.