58 at ISO 100 Guide Number, 5600 K Color Temperature, TTL and Manual Flash Mode, Insulated Gate Bipolar Transistor (IGBT) Circuit Design, Higher Speed of Charging Recycle, Charging Socket for External Flash Pack, PC Port (3.5 mm), Sound Prompt System, Modeling Light Function, Setting and Automatic Saving Setting, Overheating Protection, Wireless Sensor, LED Display and Metal Version Hot Shoe