1. 4*1 hdmi switch 1.3v with switch button, full1080p 2. ZINC alloy shell 3. hdmi liscensing LLC certificated 4.CE,rohs, ATC 4 ports hdmi switch with switch buttonFeatures:Simple operation: without any more setting, you can use it freely.Supports HDMI/DVI source input selection, which could be selected by button switch.It could apply to HDTV, DVD, digital top box and projector which has HDMI/DVI ...