This Vivitar Zoom Thyristor 3500 camera flash is a versatile and reliable unit for any photographer using Pentax ME Super MG DM/O. With a hot shoe mount interface, this flash is compatible with Vivitar brands and features a guide number of 15m. The strobe light type and zoom feature make it ideal for any type of photography, whether it be digital or film. This unit was manufactured in Japan and comes with all the necessary features to take excellent photos. It's compact and easy to carry, making it a perfect addition to your camera bag.