This is the classic Sennheiser MKE 400 shotgun microphone. It runs on AAA batteries. Since it's not a plug-in power type, it can be used with almost all DSLR cameras, video cameras, and action cameras. It shows some signs of use. There are no functional issues. There is a small tear in the sponge part, although it's not very noticeable (see photo 3). Only the windjammer has the box and accessories.