Twin-tube ring light designed for macro photography. Flash tubes can fire together or independently. The brightness can be adjusted. Includes 6 pieces of adapter rings for you to choose. This light fits macro shot, scientific research, medical and personal hobbies use. The right and left light tubes output can be set manually from 1/1 to 1/128. The right and left light ratio also can be set separately. There are two supporting focusing lights on the top and bottom of the ring light. The light has a power saving function, there"s power save indicator on the control unit. The light has a PC terminal which can connect to the flash PC Sync cord cables. The hot-shoe mount is made of metal, so it is confirm, substantial and can be lock on quickly. Quick lock button can guarantee your control unit connects on to the hot-shoe firmly. It fits several camera brands Canon, Nikon, Olympus, Samsung, Pentax, Sony (for Sony you will need a hot shoe adapter). Suitable for: Canon, Nikon, Pentax, Olympus etc camera Sony, Minolta (But the users need to buy a hot-shoe converter adapter) camera Package Contents: 1 LED Macro Light and Power Controller 6 Adapter Ring (49mm, 52mm, 55mm, 58mm, 62mm, 67mm) 1 Soft Bag 1 Manual