In the cable channel are a standard power cable and a "normal thick" HDMI cables which lead to the PC screen. Fits perfectly. However, another cable would have no place, except a very thin Toslink / optical cable. I diue white version with 0.9mm height. Other reviews complained that the cable channel is not back together or only with great effort / force I can not confirm. There are three openings available for holes. However, I have used the 3M tape, was easier :-). Conclusion: strong buy recommendation, when you have to accommodate not more than two cables!