StarTech CMDPHD2HD 3-in-1 to HDMI Adapter Cable

Overview

The StarTech CMDPHD2HD solves a problem every conference room integrator and IT tech runs into: three different laptops, three different video outputs, one HDMI display or extender waiting on the wall. Instead of stocking three separate adapters, CMDPHD2HD accepts USB-C, Mini-DisplayPort, or HDMI input on the source end and outputs a single HDMI signal at up to 4K resolution (3840x2160) at 30Hz. It's a 6.6 ft (2 m) captive cable, not a dongle-plus-cable combo, which means one less connection point to fail during a live meeting or install.

Key Features

• Tri-input connector head (USB-C, Mini-DisplayPort, HDMI): one cable covers a MacBook (USB-C or Mini-DisplayPort era), a Windows ultrabook (USB-C), and a legacy desktop (HDMI) without swapping adapters between meetings — useful in BYOD conference rooms where you don't control what shows up.
• 4K at 30Hz output: enough bandwidth for sharp desktop and document sharing on a 4K room display or matrix switcher input; note this is 30Hz, not 60Hz, so it's built for presentation and signage duty rather than fast-motion video or gaming.
• USB-powered: draws power from the USB-C connection itself, so there's no separate power brick or wall wart to run to the credenza — simplifies cable management in huddle rooms and podiums.
• 6.6 ft (2 m) length: long enough to reach from a table cubby or floor box to a laptop seat without a mid-run extension, and short enough to avoid signal loss common on longer passive HDMI runs.
• Compact connector housing — 2.4 in x 0.6 in (6.0 cm x 1.5 cm): fits in a table grommet or cable-management box without binding against neighboring cables.
• Operating range 0C to 60C (32F to 140F): rated for standard commercial interior environments — conference rooms, control rooms, AV racks — without derating concerns.
• Storage temperature -10C to 80C (14F to 176F) and 5%-90% RH humidity tolerance: relevant if you're stocking these in a warehouse or truck stock before deployment; wide tolerance means fewer climate-controlled storage requirements.
• Lightweight build at 7.8 oz (222 g): won't add meaningful strain to a table grommet or under-desk cable channel over time.

Integration & Compatibility

CMDPHD2HD is a straight source-to-display adapter cable — plug the appropriate input connector into your laptop or source device and the HDMI end into your display, HDMI extender, or matrix switcher input. Because it standardizes three input types down to one HDMI output, it pairs well behind a AV-over-IP extender or wall plate where the room only needs to expose a single HDMI port to guests. If you're speccing a multi-room AV or huddle-room build, review a PoE and cable planning guide before finalizing conduit runs, since adapter cables like the CMDPHD2HD are typically the last few feet of a longer signal chain that starts at a rack-mounted switch or extender. For rack-side connectivity in the same install, a PoE network switch handles the upstream data and power side while CMDPHD2HD handles the final display hop. The model is part of the broader StarTech connectivity catalog, alongside other adapter and extension cables in the cables and adapters category, and complements docking stations or mounting hardware used in the same conference-room build-out.

Frequently Asked Questions

Q: What's the maximum resolution CMDPHD2HD supports?

A: Up to 4K (3840x2160) at 30Hz over the HDMI output, from any of the three supported inputs.

Q: Does CMDPHD2HD need external power?

A: No — it's USB-powered, drawing power through the USB-C connection with no separate power supply required.

Q: How long is the CMDPHD2HD cable?

A: 6.6 ft (2 m) end to end.

Q: What's the warranty on the CMDPHD2HD?

A: 3-year manufacturer warranty.

Q: Can I use CMDPHD2HD with a Mini-DisplayPort laptop and later switch to a USB-C laptop?

A: Yes — the connector head supports USB-C, Mini-DisplayPort, and HDMI inputs on the same cable, so it works across different source devices without swapping hardware.

Q: What operating temperature range is CMDPHD2HD rated for?

A: 0C to 60C (32F to 140F) operating, -10C to 80C (14F to 176F) storage.

James Everett

I spec these tri-input adapter cables constantly for BYOD conference rooms, and the CMDPHD2HD's connector head is the detail that matters: USB-C, Mini-DisplayPort, and HDMI all terminate to a single HDMI output at up to 4K/30Hz. That covers roughly three generations of laptop hardware with one cable in the table cubby instead of a drawer full of loose dongles.

Technical Highlights:

• 4K at 30Hz output: enough pixel density for sharp document and desktop sharing on a large room display, though at 30Hz it's not the pick for smooth 60fps motion content — know that ceiling before you spec it for a broadcast or gaming use case.
• USB-powered design: no external power brick means one less thing to wire into a credenza or table box, and one less failure point during a live meeting.
• 6.6 ft (2 m) length at 7.8 oz (222 g): long enough to reach from a floor box to a seated presenter without a mid-run coupler, and light enough not to drag on a table grommet.

Deployment Considerations:

• The compact connector housing (2.4 in x 0.6 in / 6.0 cm x 1.5 cm) fits through most table grommets, which matters more than it sounds like on retrofits with undersized cutouts.
• Watch the 30Hz ceiling on the 4K output — if the room needs 4K/60Hz for a specific application, this isn't that cable; confirm requirements before ordering for a video-heavy install.

This is the cable I'd stock for a multi-vendor BYOD huddle room where guests bring their own laptops and IT doesn't want to troubleshoot adapter compatibility mid-meeting — one CMDPHD2HD at the table covers USB-C, Mini-DisplayPort, and HDMI sources without a drawer of loose dongles.