The ST121HDFXA is a long-range HDMI video extender kit that uses SC fiber optic cable to extend video/audio from an HDMI-equipped device to a remote display up to 2600ft (800m) away. The extender supports full high-definition video (1920x1200 / 1080p) and includes both the transmitter and receiver, for a complete ready-to-use digital signage solution. Not only is this an incredibly long range solution that can extend an HDMI signal across or between buildings, but because fiber optics transmit data using light rather than copper, it will not cause or be effected by electromagnetic Interference (EMI).