3m1203mas This is a Nikon Speedlight, the SB-17 (^^) Compatible with single-lens reflex camera F3. The following items have been tested and confirmed to work: ・Power on: OK ・Flash: OK ・No battery chamber leakage ・Some rust and dirt on the battery case The condition is good, with no noticeable scratches, and it's in good condition for its age. Please check the photos for details. Instant purchase is welcome! ◾️Included Items◾️ ・Flash unit ・Flash case (SS-17) ※Please prepare batteries (4 standard AA batteries) ◾️Product Description◾️ ・The SB-17 supports TTL auto flash, external light auto, and manual flash, allowing for high-precision flash photography when used with the single-lens reflex camera F3. ・Bounce flash is possible (adjustable flash head angle) ・Guide number is 25 at ISO 100