Promaster FM600 Electronic Flash Guide Number: 60Ft ASA 100, Recycling Time: 6 - 10 sec., Angle of Coverage: 60 degree H, 45 degree V. The FM-600 is a basic manual electronic flash. Aperture settings for your camera are determined from a scale on the flash and set manually on your camera as your flash to subject distance changes. The FM-600 works with all hot shoe cameras or any camera with a pc flash post. Specifications Attribute Manual Flash Guide Number 60 (ASA 100) Power Source 2 AA Alkaline Batteries Recycling Time 6-10 Seconds Angle of Coverage 60H 45V Attribute Covers 35mm lens on 35mm camera Weight 3.5 oz. (without batteries) Battery Life Aprox. 100 flashes Compatibility Compatible with All Hot Shoe Cameras or with PC Flash Post Includes Item Cord