Thank you for viewing. This is a National strobe, the PE-320S, with light output adjustment and ISO settings. - Model: PE-320S - ISO Setting: ISO/ASA settings available - Lock Function: Lock/release function available - Connection Terminal: External connection terminal available - Light Function: Light output adjustment available The PE-320S features a movable flash head. - Brand: National Includes a case (leather/dedicated), with some stains on the back. The original box, sync cord, and instruction manual are not included. Please understand that this item has been stored at home for a long time before purchasing. Please refrain from purchasing if you are overly concerned about condition. Thank you.