The Canon High Power Flash HF-DC1 is a supplementary unit that operates wirelessly and increases the effective flash range up to approximately 30 feet. The HF-DC1 flash is supplied with a mounting bracket so it can be attached to the camera, but it can also be hand-held or mounted on a tripod or accessory lightstand to adjust the lighting angle for professional-quality results. Multiple HF-DC1 units can be synchronized with a single camera for even greater lighting flexibility. This smart high-powered slave flash unit is compact and compatible with almost every PowerShot digital camera (Except for early models including the PowerShot 350, 600, and Pro70 cameras).