This light is used with Pro 7 power packs. Within a one-minute period, the Ring Flash handles: four flashes at 2400w/s, eight at 1200w/s or 16 at 600w/s. Comes with 11' cable, stand and camera adapter.FlashtubeGlass coverStandCamera adapter Dual lead lamp cable 11' (3.5m)Can be used with most 35mm and MF cameras and lenses up to 100mm diameterSpecial Close-up and Softlight reflectors are available