FeaturesIt has signal buffering, amplification capability and automatic identification function.can achieve long-distance transmission over 15 meters (expansion) by means of serial connectionthrough the stacking method, can significantly increase the number of HDMI output portssupport 480p, 576p, 720p, 1080i, 1080p resolutionsupport high-definition video, high-quality, clear, up to 1080p HDTV resolutionEasily connect to multi-channel audio receiving devicesfully support HDMI 1.4, support 3Dfully compatible with HDCPquick installation, easy to operatethe output image vertical pixel up to 1080P, in line with HDMI1.3 standard, compatible with HDCP protocolTechnical specificationsVideo Amplifier Bandwidth: 4.95 GbpsInput video signal level: 1.2 volts p-pInputDDC signal level: 5 volts p-p (TTL)Single connection signal range: 1080p/1920x1200HDMI connector: Class A 19-pin femaleVideo output: DVI-I 25-pin female (pure digital)Power supply: 5V DC 110V-240V, 50HZPower consumption: 5 watts (maximum)Package list:1 x 4 in 1 HDMI adapter1 x USB power cable