Key Digital KD-X444SP 4K 18G HDMI over CAT5e/6 Extender Set 164ft

Key Digital KD-X444SP: Clean 4K Extension to 164 Feet

The Key Digital KD-X444SP is a 4K/18G HDMI over CAT5e/6 extender set that carries video up to 164 feet (50 m) over a single category cable. The set pairs a transmitter at the source with a receiver at the display, moving HDMI onto twisted-pair wiring so it can travel far past HDMI's native distance limit. It preserves the latest resolution, HDR, and chroma standards across that run rather than degrading them at distance. The result is a dependable way to separate a source rack from a display without losing 4K quality.

Full-Resolution 4K over a Single CAT Cable

Resolutions up to 4096x2160 at 60Hz with 4:4:4 chroma subsampling travel the full 164-foot distance while staying HDCP 2.2 compliant. 4:4:4 chroma keeps each pixel's own color sample, which is what preserves fine text and sharp graphics rather than softening them. Because the extender rides one slim CAT-5e/6 run instead of a thick, distance-limited HDMI cable, it reaches displays a direct HDMI connection simply cannot. That makes it practical to route 4K through walls and ceilings to a far display.

18Gbps Bandwidth with Deep Color

The link carries 18 Gbps of TMDS bandwidth and passes digital video in Deep Color up to 12 bits per color. Deep Color increases the number of shades each primary can express, and 12-bit depth is what keeps HDR gradients smooth instead of showing visible banding in skies and shadows. That headroom means the far-end display reproduces color accurately and without lost detail. A source's full HDR image therefore survives the 164-foot journey intact.

Integrated IR and RS-232 Control

IR and RS-232 control signals ride the same CAT cable that carries the video to the far end. This lets a control system or handheld remote operate equipment at the remote location without pulling a separate control wire. An IR sensor and emitter are included, and the transmitter's IR input accepts serial IR directly from a control system or IR block. One category cable therefore handles both the video and the control for a point-to-point link.

Straightforward, Secure Power

A single 12V/2A screw-in DC power supply drives the KD-X444SP, and its locking connector keeps power secure in a rack or behind a display. A screw-in connector cannot be bumped loose the way a barrel plug can, which matters for a device mounted out of sight behind a screen. HDMI Type A, 19-pin female connections at each end let the set drop into existing HDMI cabling without adapters. That keeps both the power and the signal connections tidy and dependable.

Where the KD-X444SP Excels

Conference rooms, classrooms, and huddle spaces use the KD-X444SP to reach a wall display or projector sitting beyond HDMI's native limit. Retail, hospitality, and house-of-worship installers rely on its clean 164-foot reach and integrated control to place a single source and display exactly where the room design calls for. Because the run travels on standard category cable, it can be concealed in the building's structure far more easily than a bulky HDMI cable. It is the go-to point-to-point extender when the distance is moderate and network features are not needed.