Metal hot shoe, Memory function, Power saving mode, Wireless trigger sensor * Accurate brightness control, Support front curtain synchronous, Powerful flash with high Guide No: 68(m) / 223ft * Compatible with i-TTL cannon flash automatically, Supports multi-flash lighting applications (S1/S2 mode), Automatic temperature detection(overheating protection), Power Ratio: 1/1 - 1/128 * Automatic temperature detection(overheating protection),Red Eye Reduction LCD display, one year warranty * Wide Angel Diffuser & =Reflection Board