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

🎮4 HDMI inputs, 2 outputs matrix

📺4K@60Hz UltraHD clarity

🔊7.1 Channel Dolby True HD audio

€ 229.74

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Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your AV game with OREI’s 4K Matrix Switch – where clarity meets control!

IMMERSIVE 7 1 SURROUND SOUND - Enjoy premium Dolby True HD and DTS-HD Master Audio support, delivering cinema-quality audio to your workspace or home theater.
ADVANCED ARC EDID MANAGEMENT - Smart Audio Return Channel and EDID bypass ensure flawless audio-video sync and compatibility across all your devices.
SEAMLESS 4 K ULTRA HD EXPERIENCE - Supports stunning 4K x 2K resolution at 60Hz for crystal-clear visuals that keep you ahead in every meeting or binge session.
PLUG PLAY WITH RELIABLE SUPPORT - Easy setup with included remote and power adapter, backed by OREI’s responsive customer service—because your productivity deserves zero downtime.
FULL MATRIX CONTROL WITH IR REMOTE - Switch effortlessly between 4 HDMI sources and 2 displays with intuitive remote control—perfect for multitasking pros and tech-savvy managers.

The OREI 4K HDMI Matrix Switch UHDS-402A is a professional-grade 4-in, 2-out HDMI switcher supporting ultra-high-definition 4K resolution at 60Hz and advanced audio formats including Dolby True HD and DTS-HD Master Audio up to 7.1 channels. Featuring ARC support, smart EDID management, and full HDCP 2.2 compliance, it enables seamless switching between multiple HDMI sources with an IR remote. Ideal for home theaters, conference rooms, and multimedia setups, it offers plug-and-play installation and reliable customer support from a trusted AV brand.

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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€ 229.74

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered 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 Finland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Best international shipping I've ever tried. Worth every penny!

3 days ago

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2 weeks ago

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