... DVD, VCR, amplifier, switches, 1394 card, sound card, Cable TV set-top box,Digital camera, Computer peripheral digital products, copier, printer, Printing equipment ... . 3). Plug type: Square type plug/Toslink (including inserted core have metal and plastic two) Round plug / 3.5 mm ... specifications performance) Cable core diameter (PMMA)Φ 1.0 mm can make DameterΦ1.0mm,Φ1.5mm,Φ2.2mm,Φ3.0mm,Φ4.0mm,Φ5.0mm ...