Features It 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 protocol Technical specifications Video Amplifier Bandwidth: 4.95 Gbps Input video signal level: 1.2 volts p-pInput  DDC signal level: 5 volts p-p (TTL) Single connection signal range: 1080p/1920x1200 HDMI connector: Class A 19-pin female Video output: DVI-I 25-pin female (pure digital) Power supply: 5V DC 110V-240V, 50HZ Power consumption: 5 watts (maximum) Package list: 1 x 4 in 1 HDMI adapter 1 x USB power cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.