Re-amping attenuator. This is the HO attenuator, built after Mr Ho sold the company. Works great. Pot was a little scratchy so I replaced it with one purchased from Mr Ho. I have an extra pot as well, that cones with it, in case it gets scratched.
Has 100V outlet on back for safer plug-in of the amp. Has the Plexi-switch to make it brighter when needed.