The Diana F+ Flash unit is a very flexible and lightweight flash that's powered by a single AA battery (not included). It can work with either Diana style camera with two pin flash contacts or any camera with a conventional hot shoe (by using the included adapter). It's a very nice aesthetic match with older rangefinder and SLR cameras.
Condition notes This flash was tested on both SLR and Diana cameras and is working perfectly.
We haven't been able to locate a manual but Flickr user Gabriel Valasco created this handy table: