The PTZOptics Serial DB9 Male to Female Extender Cable (25ft) allows you to stretch your serial/VISCA cables over a longer distance, for control of a compatible camera like the PTZOptics 30X-NDI Live Streaming Broadcast Camera with the HuddleCamHD HC-JOY-G3 Serial PTZ Joystick. This serial DB9 Male to Female cables is plenum rated.