I have a receiver going to the hdmi input and output going to tv and projector how can I get arc to work on my smart tv currently no sound but picture

No, this will not transfer ARC in this setup.

Does this support hdmi 2.1 cables?

HDMI cables will work regardless of version, just older cables may not be able to transmit video at the same frame rate. But newer version cables will work with older devices. The higher version cable will NOT make an older version hardware perform better.

I bought the 402a for my Nvidia shield tv and my Roku4 to extract the Dolby 5.1 to my old reaciver but the signal still prologic , i try all setup

You need the OREI HDA-925 for your setup: https://www.amazon.com/OREI-60Hz-Audio-Converter-Extractor/dp/B07T6CDPQJ/

En que puerto puedo conectar el hdmi arc ?

The hdmi output 1 supports ARC audio extraction so that extracted audio would be output from optical connection.

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OREI 4K HDMI Matrix Switch 4 X 2, Switcher 18G UltraHD with Arc Supports Upto 4K @ 60Hz & 1080P IR Audio Extractor Arc EDID HDCP 2.- Remote Control - Full Matrix Selection

Product ID: 365682951

Details

Brand
OREI
Cable type
HDMI
Colour
Black
Compatible devices
Television DVD
Connector type
HDMI

🎵7.1 channel Dolby TrueHD audio

📺4K@60Hz UltraHD clarity

🔀4x2 full matrix switching

995 zł

Duties & taxes included

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Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔀 Elevate your AV game with flawless 4K switching — don’t get left behind!

SEAMLESS 4 K ULTRA HD EXPERIENCE - Supports stunning 4K x 2K resolution at 60Hz for crystal-clear visuals that elevate your home theater or gaming setup.
SMART EDID HDR COMPATIBILITY - Advanced EDID management ensures perfect signal compatibility and HDR support for vibrant, lifelike colors.
IMMERSIVE AUDIO WITH ARC HDCP 2 2 - Enjoy premium sound with Dolby True HD, DTS-HD Master Audio, and Audio Return Channel support for a theater-grade audio experience.
PLUG PLAY WITH WIDE DEVICE SUPPORT - Compatible with TVs, gaming consoles, Blu-ray players, and more — plus easy setup with included power adapter and manual.
FULL MATRIX CONTROL AT YOUR FINGERTIPS - Switch effortlessly between 4 HDMI inputs and 2 outputs with IR remote control, giving you ultimate flexibility and convenience.

The OREI 4K HDMI Matrix Switch UHDS-402A is a professional-grade 4 input to 2 output HDMI switcher supporting 18Gbps bandwidth, 4K@60Hz UltraHD resolution, HDCP 2.2, and full 3D. It features ARC audio return channel, Dolby True HD and DTS-HD Master Audio support, smart EDID management, and comes with an IR remote for seamless source switching. Ideal for home theaters, gaming setups, and multi-device environments.

Specifications

ASIN	B07ZTWGBHL
Audio Output Mode	PCM, Dolby True HD, DTS-HD Master Audio
Best Sellers Rank	16,975 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 63 in Switches
Brand Name	OREI
Cable Type	HDMI
Color	Black
Compatible Devices	Television, Gaming Console, DVD Player, Blu-ray Projector, Monitor, Personal Computer, Laptop
Connector Type Used on Cable	HDMI
Country of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (354)
Global Trade Identification Number	00850008956072
Manufacturer	OREI
Manufacturer Part Number	UHDS-402A
Model Number	UHDS-402A
Number of Items	1
Number of Ports	4
UPC	850008956072

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995 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

2 months ago

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