Olympus Electronic Flash P11. This is a small and popular, rare flash. Power-on and flash firing have been confirmed. I used it with an Olympus mirrorless camera. Originally for cameras like the Pen EE-3, but it has a universal mount and is not TTL compatible, so it can be used with many other manufacturers' cameras. The GN is calculated to be 11.2 (ISO 100). Batteries are not included. There are some scratches.