Size: 117mm*114mm*99mm Weight: 522g Compatible with Many Strobes by Optional Adapter: SUPE Scubalamp D-Max,D-Pro; GTX, GTM, Inon Z330, Seacam 150;100, Ikelite 161,160; Sea&sea YS-D2, YS-D3 and Retra Stobe Adjustable aperture at 8 modes. Easy installation and release. With neck for Landyard in case of loss. Future-Proof and water-proof Beat working distance is 150-200mm