This item is a Canon 160E Speedlight flash for EOS film cameras.  It was tested and it works properly.  It is a simple compact flash designed for Canon EOS film cameras.  It will moderate the flash intensity for good exposures on EOS film cameras, but not with digital cameras. Recycle time is very fast with a good battery installed.  It takes a 2CR5 or Duracell 245 battery that is not included.