NEEWER TT560 Flash Strobe Speedlight 【Flash Control】 Guide Number 38 (at ISO 100), Manual (M) Compatible with S1/S2 optical control. In M mode, flash output can be easily adjusted from 1/1 to 1/128 in 1/8 stop increments. Please note: Not compatible with TTL, HSS, or camera menu settings. This is a listing for the main unit only. The outer box is not included. There are minor scratches and dirt from storage, but they are not noticeable. Overall, it gives a clean impression. Immediate purchase is OK ⭕️