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Compact black aluminium HDMI switch with three inputs and IR remote

Mrocioa

Mrocioa D321ARC HDMI 2.1 Switch 8K 60Hz 3 Port ARC

SKU CH-868B-JD7SA

An 8K HDMI 2.1 switch with three inputs, ARC/eARC support and iOS app control

  • Port count3
  • Adapter typeHDMI
  • Cable length0 ft (0 m)
  • Input ports3 x HDMI Female
  • Output portsFemale-to-Female
  • Maximum supported resolutionsMedium
  • Connect three 8K sources to one display with 48 Gbps bandwidth
  • Extract TV audio to a sound system using ARC and eARC support
  • Switch inputs from an iPhone app without the IR remote
  • Change sources automatically or manually for flexible operation
  • Built in a black aluminium housing for durable daily use

Three 8K sources on one display

The Mrocioa D321ARC is an HDMI 2.1 switch that lets you connect three 8K 60 Hz devices such as a PS5, Xbox or PC to a single screen. It handles 48 Gbps bandwidth with HDR10+, Dolby Vision and Dolby Atmos pass-through. The aluminium chassis runs plug-and-play with no drivers required.

Passive cooling and low power draw

The unit has no fan and draws minimal power from the HDMI sources, so it adds no audible noise or measurable heat to a desktop setup. HDCP 2.3 and CEC signals pass through transparently, keeping the link stable during long viewing sessions. Auto-switching selects the active input without user intervention.

ARC audio return and iOS remote control

When a compatible TV and sound system are connected to Input 1, ARC and eARC carry audio back from every switched source, removing the need for a separate extractor. An iPhone app duplicates the IR remote and lets you change resolution per channel. The remote can also stand in for basic TV or player controls.

How it compares

Measured against everything we stock in HDMI & AV Selector Switches, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 73% of the 1,998 comparable items (median $27.99).

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Specifications

Product
Brand nameMrocioa
Model nameD321ARC
Product type8K - 3 Port with ARC
Adapter typeHDMI
Product colorBlack
Display
Maximum supported resolutionsMedium
Ports & slots
Port count3
Input ports3 x HDMI Female
Output portsFemale-to-Female
Size & build
Cable length0 ft (0 m)

Questions about this item

How do I set up the 3-port HDMI 2.1 switch with ARC and what step is often missed?

Connect up to three 8K sources to the three HDMI inputs, link the output to your display, and plug an audio system into Input 1 for ARC/eARC; both the TV and speakers must support ARC or the audio return will not work.

What part of the D321ARC will need replacement first?

The IR remote uses a button battery that will eventually run out; the aluminium switch itself has no moving parts or consumable components.

What bandwidth limit appears first during long 8K 60 Hz sessions?

The 48 Gbps HDMI 2.1 ceiling caps sustained 8K 60 Hz HDR signals; if the source tries to exceed that rate the switch will drop to a lower resolution or refresh rate.

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