Oct 8, 2026Product News
MZTC344C: a Pro-Grade 4K HDMI Capture Card With 100W Pass-Through
The MZTC344C captures HDMI at 4K 30Hz over USB-C with loopout, audio mixing and mic input, plus 100W PD pass-through so the streaming rig never loses power.
Live streaming forgives nothing. A dropped frame, a desynchronized audio track or a capture device that overheats in hour two is not a minor annoyance: it is the audience leaving. The MZTC344C Pro-Grade 4K HDMI Capture Card, the anchor product of the Mattzon HDMI capture line, is engineered around that unforgiving fact, and its specification reads like a checklist of everything a streamer, educator or event producer actually needs on show day.
The Signal Path: In, Out, and Into the Machine
Start with the core job. The card takes HDMI input at 8Gbps, enough headroom for a full-quality source, and captures over USB-C at up to 4K 30Hz, with the format flexibility professional software expects: YUV422, MJPEG, RGB24 and NV12 are all supported, so OBS, vMix, QuickTime or whatever the production runs can pick the codec that fits the machine instead of fighting the hardware.
Then the part that separates pro-grade from toy-grade: HDMI loopout up to 4K 30Hz. The source keeps feeding a local monitor at full quality while the capture runs, so the operator watches the real signal, not a compressed copy. For gameplay, live events, medical and classroom demonstration rigs, loopout is the difference between confidence and guesswork.
Audio: Mixing Without Extra Boxes
Listen to the audio path, because it quietly replaces two devices on the desk. The MZTC344C carries a 3.5mm headphone jack with HDMI audio mixing and an external microphone input with audio mixing as well. In plain terms: the commentator's voice and the HDMI source audio combine inside the card, and monitoring happens on the same device. No separate USB mixer, no second adapter, no sync drift between voice and game.
Power That Keeps the Rig Alive
And then the feature that our regular readers will recognize as the point: USB-C Power Delivery pass-through at up to 100W. Capture devices sit in the middle of the laptop's most valuable port, and cheap ones steal that port's power budget along with it. The MZTC344C lets the charger plug into the card and delivers the full budget onward, so the laptop drives the stream, the capture and the monitor while charging at full speed. On a long stream day, that is the specification that keeps the whole rig alive.
Every unit ships after per-port functional testing and an aging test from our own Shenzhen factory, because the reliability argument for a capture card is made in the hours nobody sees.
Who Buys Capture Cards in Q4
The timing is not accidental. Q4 is streaming season: the big game releases land across October and November, holiday creators open their channels, and education and corporate teams standardize their hybrid-classroom rigs before January. Distributors and brand buyers looking at this category should note that it rewards honest specifications and tested reliability, precisely the ground Mattzon competes on, with 89% private-mold products, OEM and ODM service, no minimum order quantity and 3 to 25 day lead times.
Full specifications are on the MZTC344C product page at www.mattzon.com. For samples, OEM customization or a quote, message Kitty's team on WhatsApp at +86 186 8146 2886.
