4 Channel HD/SD Digital Video Switcher Supports up to Full HD 1080p Video Input: 4x HDMI Video Output: 2x HDMI (1x Multiview | 1x Program) Audio Input: 1x Stereo RCA | 2x Microphone Audio Output: 1x Stereo RCA | 1x Stereo headphone mini Jack Audio Mixer: 2x Mic | 1x Stereo RCA | 1x internal Digital embedded Audio LED Meter Transitions: Wipe, Mix & Cut Keyer: Lumakey Picture-in-picture and split functions Tally Output