This Sunpak Power Zoom 4000AF flash is a reliable and efficient accessory for your photography needs. Compatible with Canon cameras, this flash has been tested and is in working order, ensuring that it will help you capture the perfect shot every time. With its zoom feature, this flash is ideal for capturing images from a variety of distances and angles. The brand name of Canon adds to its quality, making it a valuable addition to your photography equipment. Whether you're a professional or just starting out, this Sunpak Power Zoom 4000AF flash is a must-have for any photographer.