The Gefen EXT‑DVI‑EDIDP, also known as the DVI Detective Plus, is a compact EDID emulator and repeater designed to maintain stable video output from DVI sources. It captures and stores display EDID information, supports HDCP with DDC re-clocking, and can emulate multiple EDID profiles continually-ideal for systems with switchers or displays that power cycle. Supports dual-link resolutions up to 3840×2400.

EDID stands for Extended Display Identification Data. It is the standard table of characteristics of a display that is used by the source to optimize its output resolution, timing, and other operating parameters. When a display is switched off, de-selected by a matrix/switcher, or disconnected and then reconnected, the EDID can be lost. If this occurs, the video source device may lose its ability to output the correct image instantly. The Gefen DVI Detective Plus addresses this issue by recording the EDID from a display and making it available to a source at all times, as if the display is still connected. This product also passes through the communications between an HDCP-enabled source and display as necessary.