Two 300W studio strobes with stable 5600K color temperature provide powerful and reliable flash lighting for still, product, portrait, and wedding photography. The aluminum alloy casing is robust enough to withstand years of wear and tear. Adjust the flash output from 7.0–10 (1/8–1/1) as needed. Fast recycling time (0.4–2.5s) and flash duration (1/800–1/2000s) ensure that the strobe will always be ready for your capture. High guide number (58) offers more options on flash distance and aperture. The modeling lamp features a 9-stop brightness range adjustable by 10% increments In optical slave S1/S2 mode, one strobe will generate a flashlight when it senses the light produced by another strobe. These two strobes illuminate at the same time to diminish shadows and make your subject pop Set the trigger and receivers to the same channel from 16 available channels and control the studio strobe from up to 99’/30m (outdoor) or 66’/20m (indoor)