BBX is easy to operate, just point and shoot. Light and bright, with a flash rate of up to 10,000 times per minute (FPM), these flashes are comfortable to hold and can operate continuously without the risk of overheating. The BBX battery-powered strobe weighs just 1.9 pounds. (0.86kg) can run continuously for 2 hours on one charge. Includes a slow charger; Charging time The charging time is 4 hours.