... 2.anti-interference, high-definition, High fidelity, Low loss Square type plug/Toslink ,5.5 cable connector plug Specification : ... VCR, amplifier, switches, 1394 card, sound card, Cable TV set-top box,Digital camera, Computer peripheral digital products, copier, printer ... , medical equipment and power system, etc. 3). Plug type: Square type plug/Toslink (including inserted core have metal and plastic ...