Stereo Hi-Fi/video GLI balun allows single composite video signal to be transmitted via unshielded twisted pair (UTP) cable up to 2200ft (670m) in point-to-point connection. Stereo Hi-Fi/video GLI balun features full audio bandwidth response for high fidelity applications and features ground loop isolation (GLI) to help eliminate hum"bars. Only one 500039-GLI is required per connection and may be used in conjunction with 500001, 500039 and 500200. It is recommended where ground loop issues are present or of potential concern and may be applied in applications such as residential, classroom and boardroom AV systems.