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UGREEN 35223 Bluetooth 5.2 AUX/RCA Transmitter/Receiver

Rs. 4,999.00 Rs. 11,108.00
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Crystal-Clear Sound
Seamless Pairing
Long Playtime
Dual Connection
Stable Range
BLUETOOTH 5.2 • 3.5MM + RCA KIT • TX/RX

UGREEN 35223 Bluetooth 5.2 AUX/RCA Transmitter/Receiver

Overview

UGREEN 35223 is a rechargeable Bluetooth 5.2 transmitter/receiver with a 3.5mm port and a cable kit for AUX and stereo RCA equipment. This guide explains direction, pairing, codec limits, microphone behaviour, battery expectations and safe use without borrowing claims from similar UGREEN products.

SKU 35223Bluetooth 5.2 AUX/RCA AdapterBlackTX + RX
UGREEN 35223 Bluetooth 5.2 TX/RX adapter with its exact AUX, RCA and USB-C cable set — SKU 35223
Bluetooth 5.2 TX/RX adapter with its exact AUX, RCA and USB-C cable set — SKU 35223

Key features

Exact product role

a rechargeable Bluetooth 5.2 transmitter/receiver with a 3.5mm port and a cable kit for AUX and stereo RCA equipment.

Audio direction

TX accepts analogue audio from a 3.5mm or RCA source and sends it to Bluetooth headphones/speakers. RX receives Bluetooth audio from a phone/tablet and supplies 3.5mm or stereo RCA analogue output to a car, amplifier or powered speaker.

Codec boundary

No exact codec list is asserted. Bluetooth 5.2 does not prove aptX, LDAC, AAC or LC3, so none is promised.

Compatibility boundary

3.5mm AUX and stereo RCA outputs/inputs through the included leads; Bluetooth headphones, earbuds, speakers, phones and tablets. Single 3.5mm aircraft sockets can be used; dual-prong aircraft sockets require the proper adapter and airline permission.

Audio direction: source → product → listener

TX accepts analogue audio from a 3.5mm or RCA source and sends it to Bluetooth headphones/speakers. RX receives Bluetooth audio from a phone/tablet and supplies 3.5mm or stereo RCA analogue output to a car, amplifier or powered speaker.

Why direction matters: transmitter, receiver and headset roles are not interchangeable. A Bluetooth version number also does not establish microphone return, codec, multipoint or low latency.

Before pairing: identify the wired input/output, set the correct operating mode and lower volume at every powered endpoint.

UGREEN 35223 TX source-to-headphones and RX phone-to-audio-system direction diagram
TX source-to-headphones and RX phone-to-audio-system direction diagram

Sound, codecs and latency

Codec support

No exact codec list is asserted. Bluetooth 5.2 does not prove aptX, LDAC, AAC or LC3, so none is promised.

Delay and sync

No exact millisecond figure is verified. Suitability for video depends on the complete source-adapter-headphone chain; musical instruments are expressly not recommended.

Real-world sound

Final fidelity depends on the source file, negotiated codec, RF conditions, transducers, fit, amplifier and volume. “Bluetooth 5.x” alone is not a sound-quality tier.

For games and video

Treat every millisecond figure as a controlled test result. Wireless display processing, game engines and headset buffering can add delay.

Use scenarios

Scenario 1

TV or PC analogue output to one or two Bluetooth headphones.

Scenario 2

Single-jack aircraft screen to supported Bluetooth headphones.

Scenario 3

Phone audio to an older car or amplifier via AUX.

Scenario 4

Phone audio to a stereo amplifier through included 3.5mm-to-RCA lead.

Scenario 5

Two-phone RX pairing with one active stream at a time.

UGREEN 35223 RX-mode car and marine AUX use; configure pairing and volume only while safely stopped
RX-mode car and marine AUX use; configure pairing and volume only while safely stopped

Setup and usability guidance

  1. Step 1: Charge through USB-C and select TX or RX before turning on.
  2. Step 2: Connect the appropriate included lead to an output in TX or an input in RX.
  3. Step 3: Enter pairing and connect the first Bluetooth endpoint.
  4. Step 4: Re-enter pairing for the second endpoint using the manual’s TX or RX sequence.
  5. Step 5: Keep volume low, then verify which device owns playback or call control.

Best practice: pair one endpoint first, verify stable audio, then add any supported second endpoint. This makes faults easier to isolate.

Controls

TX/RX switch, pairing multifunction button, volume/track buttons and built-in microphone are shown. Volume/track controls are for supported RX use, not TX source control.

Microphone and calls

Built-in microphone supports calls in RX mode only. TX does not carry a wireless-headset microphone back through the 3.5mm/RCA source connection.

Two-device behaviour

Dual pairing is supported in TX and RX. TX can share one programme with two headphones; RX connects two source devices but does not mix them. Volume buttons do not work in TX according to official guidance.

Reset path

Forget the adapter on source devices and clear its saved pairings using the exact manual sequence. Power off before changing direction or re-cabling.

UGREEN 35223 Flight, treadmill, television and car examples; connector permission and safe-use limits still apply
Flight, treadmill, television and car examples; connector permission and safe-use limits still apply

Compatible devices and systems

Verified compatibility class: 3.5mm AUX and stereo RCA outputs/inputs through the included leads; Bluetooth headphones, earbuds, speakers, phones and tablets. Single 3.5mm aircraft sockets can be used; dual-prong aircraft sockets require the proper adapter and airline permission.

  • Match Bluetooth audio capability, not just the word Bluetooth. Some TVs, consoles and computers support controllers or data but not Bluetooth audio.
  • Confirm whether the desired direction is sending audio, receiving audio or returning a microphone. These are separate capabilities.
  • Confirm physical connector role and audio type: analogue AUX, optical PCM or USB audio are not interchangeable.
  • Update the host operating system and test with other saved Bluetooth devices temporarily disconnected.
  • When using branded earbuds/headphones, check their pairing limits and supported codec list too.
UGREEN 35223 Product diagram identifying microphone, TX/RX switch, controls, audio jack and USB-C port
Product diagram identifying microphone, TX/RX switch, controls, audio jack and USB-C port

What this product does

  • Switches between Bluetooth transmitter and receiver roles.
  • Uses the documented wired audio interface as input in TX and output in RX.
  • Supports the exact dual-pair and call behaviour stated above.
  • Runs from its rechargeable battery for portable use.
  • Reconnects to saved devices when mode and endpoint are available.
UGREEN 35223 Dual-pairing artwork for two compatible listening endpoints in transmitter use
Dual-pairing artwork for two compatible listening endpoints in transmitter use

What this product does not do

  • not optical; not USB audio; not a digital RCA S/PDIF adapter; not recommended for musical instruments; TX volume buttons and microphone return are not supported.
  • Does not guarantee uninterrupted wireless service through walls, crowds, RF congestion or defective device ports.
  • Does not improve a poor recording, repair a damaged socket or guarantee a particular listening volume.
  • Does not mix two independent programmes or create independent listener volume unless expressly documented.
  • Does not prove compatibility merely because a connector fits or a device advertises Bluetooth.

What to do

Start with one device

Pair and test one endpoint before adding a supported second device or extra cable path.

Keep volume low

Begin at low source and destination volume, especially after switching RX/TX, ANC modes or audio outputs.

Keep firmware and OS current

Updates can improve Bluetooth stability, but use only official vendor updates and do not assume they add unlisted hardware features.

Protect ports and batteries

Grip connectors by housings, keep charging contacts dry and store the product away from loose metal objects.

Confirm active codec or mode

Use the host menu or product display when available. Marketing names do not prove what was negotiated.

Dry before charging

After sweat or a splash, wipe and air-dry completely before returning earbuds to a case or connecting USB power.

What not to do

Do not assume version = feature

Bluetooth 5.x does not automatically mean aptX, LDAC, ANC, multipoint or microphone return.

Do not force connectors

Stop if a plug does not align or fully seat; check direction, port type, case clearance and debris.

Do not charge wet hardware

Moisture plus charging contacts can cause corrosion, heat or failure.

Do not use ANC as protection

Noise cancellation does not certify safe exposure in factories, workshops, shooting, aviation or other hazardous noise.

Do not pair while driving

Configure calls, volume and source switching only while safely parked.

Do not invent reset gestures

Use the exact model manual; similar HiTune and Bluetooth adapters use different button timing.

Battery, charging and realistic runtime

Runtime: Official exact-SKU detail separates up to 27 hours TX and 22 hours RX from the 300mAh battery. Real runtime varies with volume, range, call time and temperature.

Power method: USB-C charging. The product is battery powered; the USB-C port is not described as a computer USB audio interface.

  • Published runtime is normally measured under controlled conditions; high volume, ANC, premium codecs, calls, displays, cold weather and weak signal can shorten it.
  • Lithium batteries age. Lower runtime after repeated cycles is normal; swelling, leakage, excessive heat or odour is not.
  • Use compliant cables and power sources, keep ventilation clear and disconnect if the product becomes unusually hot.
  • For long storage, avoid leaving the battery empty for months; recharge periodically according to the supplied manual.
UGREEN 35223 Exact Bluetooth 5.2, 300 mAh, 27-hour TX and 10 m headline comparison artwork
Exact Bluetooth 5.2, 300 mAh, 27-hour TX and 10 m headline comparison artwork

Warnings and limitations

  • Hearing: start at low volume, take listening breaks and reduce level if you notice discomfort or ringing. ANC is not hearing protection.
  • Situational awareness: do not use isolating audio or ANC where hearing traffic, alarms, announcements or instructions is important.
  • Battery: do not crush, puncture, burn, short, disassemble or charge a wet/swollen/hot product. Stop use if odour, leakage or deformation appears.
  • Children and pets: keep earbuds, tips, adapters and cables away from small children; small components can be a choking hazard.
  • Aircraft: follow crew instructions, use only permitted seat audio sockets and keep wireless functions off whenever required.
  • Driving: pair and adjust while parked. Hands-free capability does not remove attention or legal obligations.
  • Connections: use only low-level headphone/AUX or stated optical/USB interfaces. Do not connect analogue audio ports to mains, speaker-level or unknown industrial signals.

Troubleshooting and reset

No pairing

Move endpoints close together, charge/power both, disconnect competing saved devices, verify TX/RX direction and restart pairing.

Audio but no microphone

Confirm RX mode and the built-in-microphone call path; TX mode does not return a headset microphone.

Drop-outs

Reduce distance, remove body/metal obstruction, move away from crowded 2.4GHz sources and test one paired device at a time.

Delay

Use a verified low-latency mode only where listed, confirm both endpoints support the needed codec and compare with a wired path.

Only one side/listener

Test the first endpoint alone, then pair the second using the model-specific dual-pair sequence.

Model-specific reset

Forget the adapter on source devices and clear its saved pairings using the exact manual sequence. Power off before changing direction or re-cabling.

Technical specifications

Product UGREEN Bluetooth 5.2 transmitter/receiver kit
SKU / colour 35223 / black
Bluetooth version 5.2
Audio interface 3.5mm analogue; stereo RCA through included cable
Wireless roles TX and RX
Dual pairing Supported in TX and RX
Microphone Built in; RX calls only
Battery 300mAh listed
Runtime Up to 27h TX / 22h RX
Listed range Up to 10m / 32.8ft open conditions
Charging USB-C
Codecs Not specified; no aptX/LDAC inference
TX control limitation Volume buttons do not work in TX

Numbers are exact-SKU listing or exact-media figures unless marked unverified. They are qualified laboratory maxima, not universal guarantees.

Package contents

Package: Adapter, 3.5mm-to-stereo-RCA cable, 3.5mm male-to-male cable, 3.5mm male-to-male coupler/adapter and USB-C charging cable, as shown in exact live package media.

Pre-purchase checklist

  • Confirm SKU on the product/box rather than buying by family name alone.
  • Confirm transmitter versus receiver direction and every wired connector.
  • Confirm microphone/call need, desired codec and simultaneous-device need separately.
  • Check whether the exact source device supports Bluetooth audio, not only Bluetooth peripherals.
  • Inspect the sealed package on arrival and retain the manual for the correct reset and control map.
UGREEN 35223 Exact package layout with adapter, AUX/RCA leads, coupler and USB-C charging cable
Exact package layout with adapter, AUX/RCA leads, coupler and USB-C charging cable

Product-specific FAQ

What exactly is UGREEN 35223?

It is a rechargeable Bluetooth 5.2 transmitter/receiver with a 3.5mm port and a cable kit for AUX and stereo RCA equipment.

What is the difference between TX and RX mode?

TX accepts analogue audio from a 3.5mm or RCA source and sends it to Bluetooth headphones/speakers. RX receives Bluetooth audio from a phone/tablet and supplies 3.5mm or stereo RCA analogue output to a car, amplifier or powered speaker.

Which codecs are supported?

No exact codec list is asserted. Bluetooth 5.2 does not prove aptX, LDAC, AAC or LC3, so none is promised.

Is there a guaranteed low-latency mode?

No exact millisecond figure is verified. Suitability for video depends on the complete source-adapter-headphone chain; musical instruments are expressly not recommended.

Do calls and the microphone work?

Built-in microphone supports calls in RX mode only. TX does not carry a wireless-headset microphone back through the 3.5mm/RCA source connection.

Can TX or RX mode use two Bluetooth devices at once?

Dual pairing is supported in TX and RX. TX can share one programme with two headphones; RX connects two source devices but does not mix them. Volume buttons do not work in TX according to official guidance.

What battery life should I expect?

Official exact-SKU detail separates up to 27 hours TX and 22 hours RX from the 300mAh battery. Real runtime varies with volume, range, call time and temperature.

How is it charged or powered?

USB-C charging. The product is battery powered; the USB-C port is not described as a computer USB audio interface.

Which devices are compatible?

3.5mm AUX and stereo RCA outputs/inputs through the included leads; Bluetooth headphones, earbuds, speakers, phones and tablets. Single 3.5mm aircraft sockets can be used; dual-prong aircraft sockets require the proper adapter and airline permission.

What should I do if pairing fails?

Forget the adapter on source devices and clear its saved pairings using the exact manual sequence. Power off before changing direction or re-cabling.

What is included?

Adapter, 3.5mm-to-stereo-RCA cable, 3.5mm male-to-male cable, 3.5mm male-to-male coupler/adapter and USB-C charging cable, as shown in exact live package media

Exact-SKU research and media reconciliation

Research method: exact live Shopify record and images were checked against available UGREEN-owned regional product pages. Similar-family features were excluded whenever model, SKU, revision or artwork conflicted.

Media decision: Eight of nine exact images are used once. The single TV/headphone lifestyle image is excluded as redundant because the retained dual-pair and four-scenario slides already show that use; no conflicting or non-SKU media is embedded.

Excluded exact-media slide: Redundant TV/headphone lifestyle slide; the same use is covered more completely by the dual-pair and four-scenario exact slides within the eight-image cap.

Source records: UGREEN source 1 · UGREEN source 2

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