LINE OUT BOX made by SKRYDSTRUP R&D, with adjustable line level. Features phase switch and GND lift function. Similar products with the same name are now available from Shur, but this is a custom box made by SKRYDSTRUP, which has many major artists as clients. Since they are now CAVEMAN, items under the SKRYDSTRUP name are probably rare. No dummy load function. Body only, no accessories.