This Vivitar Auto Thyristor 3700 is an excellent vintage camera accessory for photographers. With a swivel feature and a hot shoe mount interface, this shoe mount flash is perfect for those who want to experiment with different lighting angles and settings. This item is designed for use with Vivitar cameras and is a great addition to any camera collection. The flash is being sold untested, but with its brand reputation, it is sure to be a valuable purchase for any camera enthusiast.