Fan, frosted glass dome, 65 deg. refl.,detached 18' cable . The Dynalite SH2000 Studio Flash Head gives photographers the control they require in the studio and the ability of bringing their same lights on location, because every component was designed to minimal size and weight specifications.The SH2000 head is a fan cooled 2000 watt/second studio flash head with a frosted glass dome for even light dispersion and more acurate previewing from the 250 Watt quartz modeling lamp. The SH2000 head is designed for use with a variety of studio type reflectors for total control of lighting effects (See "Accessories"). A power supply for this flash head is required.