InLine 89906E, Toslink, Buttons, Black, 3.54" (90 mm), 2.17" (55 mm), 0.846" (21.5 mm) InLine 89906E. Audio port type: Toslink, Control type: Buttons, Product color: Black. Width: 3.54" (90 mm), Depth: 2.17" (55 mm), Height: 0.846" (21.5 mm). Audio input channels: 4 channels, Audio output channels: 2 channels. Cables included: DC