Built onto a small clamp, the 521 uses the LANC protocol adopted by Sony and Canon Mini DV, and Hi8 cameras.
The 521 can be used for a wide variety of applications. It can be mounted to a huge range of supports, such as pipes, bars, tubes, and flat surfaces.
The 521 is supplied with 522SCA connector coiled cord cable measuring 9.8? (extendable to 19.7?) long.