1.LARGE-SIZE LCD DISPLAY / LED AF ASSIST LIGHT | 4.PROVIDED WITH EXTERNAL POWER SOCKET / AUTOMATIC SETTINGS SAVING | 2.SOUND PROMPT SYSTEM / HIGH SPEED RECYCLING SYSTEM | 5.EQUIPPED WITH PC SYNC INTERFACE / SUPPORT THE LENS OF MULTIPLE FILTER SIZE | 3.SUPPORTS MASTER TTL FLASH / RING TYPE DOUBLE LAMP MACRO FLASH