Flash strobe with adjustable ISO sensitivity. - Model Name: PE-320S - Brand: National - Function: Flash - ISO Sensitivity Setting: ISO/ASA adjustable - Lock Function: Equipped with a lock switch I don't know much about it, even if you ask questions. Please check the images. Everything in the images will be sent. Please understand that this has been stored at home for a long time. As this is a used item, returns and refunds will not be accepted after the product arrives. #National #Flash