2)All HDMI 2.1 video devices have very high requirement on HDMI cables connected. 3)When using with HDMI 2.1 sources and Display, pls use certified Ultra HDMI High speed HDMI cable from HDMI adopters. 4)when using with HDMI 2.1 sources and display, the max. length shall not be more than 3M. 5)the Remote Control battery is not included, and the battery model is CR2025 6) the discrption is for 5X1 Port HDMI 2.1 Switch. it's just the Port different. the other functions are same.
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