Only offered as a modeling flash head, it handles a 800w/s quartz flashtube. The coiled head cable extends three to seven feet long. The round shape is the same as the Classic head. Heads are compatible with all generations and styles of Lumedyne power packs. There are no TTL connections on the heads only dual sync connections (1/8" mini-phone and household). Lumedyne heads are not E-TTL or D-TTL compatible because of pre-flash light metering requirements. Features: