... ” pre-flash function. The series is ideal in professional studio, providing light source as high light, background light and ... Model: 300DI Flash Output: 300WS Guide Number(ISO 100/ft): 56 Color Temperature: 5600±100KFlash Power Control: steplessModelling Lamp: 75WS( ... of Grand soft box.For photographer with equipment movement in studio, these include strong, lightweight 2.4~4kg material. therefore, ...