With the Converge A/V DVI Matrix splitter/switcher you can select between two DVI-I sources on multiple monitors (up to four), With the push of a button the VS420RDVIA lets you select what input you"d like on each display, Plus the option to independently toggle video and audio on/off for each display, This matrix splitter/switcher inludes IR control and an additional IR cable sensor if you would like to hide the unit, VS420RDVIA includes ear-mounts for 19"" rack-mount use, Number of Monitors: 4, Graphics Modes: UXGA, Graphics Resolution: 1600 x 1200Maximum, Interfaces/Ports: 4 x DVI-I Female Video Out; 2 x DVI-I Female Video In; 2 x Mini-phone Audio In; 2 x Mini-phone Audio Out, Contents: Video Switch Power Cord IR Cable Sensor Rack Mount Kit Documentation, Ports/Connectors:, Input Connectors: (2) DVI-I Ports; (2) 3, 5mm Audio Jacks, Output Connectors: (4) DVI-I Ports; (2) 3, 5mm Audio Jacks, Power Notes: Power Requirements- 12V DC 1, 5A; Input Voltage- 12DC, Returns Policy: This product is subject to our return policy, Please see our complete return policy for details, Dimensions: 1, 61"" H x 8, 66"" W x 3, 82"" D, SKU: DHVS420RDVIA