Neewer Professional Photography Studio Strobe Flash Monolight, Dual Power AC/DC 110v 300W Flash with 150W Modeling Lamp and Rechargeable Battery Pack The Studio Dual Power AC/DC 110v 300W Monolight Flash, Indoor/Outdoor Professional Strobe Flash Light, with Rechargeable Battery Pack is used in photography to produces an instantaneous flash of artificial light at a color temperature of about 5600 K to help illuminate a scene. This is a higher powered strobe light that can be used both outdoor and indoor and is good for studio work and larger scale on location shoots alike Strobe outpower: 300Ws Guide No.: 54m Flash duration: 1/1500-1/800s