The EXT-HDMI-144 1x4 HDMI Distribution Amplifier has one HDMI Input and four HDMI outputs. The 1x4 HDMI Distribution Amplifier is the perfect solution for anyone who needs to send one source of digital high definition video to multiple displays at the same time. It supports all HDMI equipment, such as DVD players and satellite set top boxes and all HDMI displays. For home theater applications, the unit is HDCP (high bandwidth digital content protection) compliant, making it effective for use with all HDMI displays. HDMI output 1 is the primary connection and is used for the main display. HDMI output 2 through 4 follow the main display. The HDMI displays attached to the 1:4 HDMII Distribution Amplifier MUST have the same native resolution in order to get a picture.