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Ugreen  |  SKU: 70303
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UGREEN 70303 Bluetooth 5.0 AUX Receiver with Microphone

Rs. 2,721.00 Rs. 4,442.00
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Dual Streaming
Long Battery
Instant Pairing
Crystal Sound
Hands-Free Calls
BLUETOOTH 5.0 • AUX RECEIVER • BUILT-IN MIC

UGREEN 70303 Bluetooth 5.0 AUX Receiver with Microphone

Overview

UGREEN 70303 receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones. Its exact signal path is Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging. The verified physical build is compact black rechargeable Bluetooth 5.0 receiver with physical controls, status LED, built-in microphone, 3.5mm audio socket and Micro-USB charging port. This guide separates the product’s real function from similar-looking splitters, extensions and digital adapters.

SKU 70303Portable receiverBluetooth wireless input to 3.5mm analogue audio output, with Micro-USB chargingBlack
UGREEN 70303 Exact live Shopify product image for SKU 70303
Exact live Shopify product image for SKU 70303

Key features

Exact connector role

Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging.

Verified use

Receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones.

Compatibility boundary

Bluetooth phones and tablets as sources; car AUX, powered speakers, receivers, amplifiers and wired headphones as 3.5mm output destinations.

Build and handling

Compact black rechargeable Bluetooth 5.0 receiver with physical controls, status LED, built-in microphone, 3.5mm audio socket and Micro-USB charging port.

Connector and signal-path guide

The receiver decodes Bluetooth audio from a phone or tablet and outputs analogue sound through 3.5mm. Its built-in microphone handles supported calls; the Micro-USB port recharges the battery.

Why this matters: 3.5mm plugs can look alike while carrying different numbers of contacts. TRS normally provides stereo left/right/ground; TRRS adds a microphone/control contact. Digital USB-C or Lightning audio needs conversion electronics rather than passive rewiring.

Direction check: Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging. Do not buy by connector diameter alone.

UGREEN 70303 Connector layout or product-specific functional artwork
Connector layout or product-specific functional artwork

Use scenarios

Older car AUX

Receive phone audio wirelessly and feed it into a 3.5mm car stereo input.

Speakers and amplifiers

Add Bluetooth reception to powered speakers or home audio with an AUX input.

Wired headphones

Plug compatible wired headphones into the receiver for portable Bluetooth listening.

Two-phone car

Keep two source devices paired, then switch playback or supported calls between them.

Setup and usability guidance

  1. Step 1: Charge the receiver with a suitable USB power source and the supplied cable before first use.
  2. Step 2: Connect the 3.5mm output to the destination. Use the supplied male-to-male adapter for a car or speaker AUX socket; plug wired headphones into the receiver socket directly.
  3. Step 3: Power on and enter pairing mode, then select the UGREEN receiver in the phone or tablet Bluetooth menu.
  4. Step 4: Start at low volume. Raise the source and destination gradually to avoid sudden loud output.
  5. Step 5: For a second phone, follow the product pairing sequence, then confirm which device is actively playing or calling.
  6. Step 6: Place the built-in microphone where speech can reach it; a low or enclosed AUX socket can reduce call clarity.

Comfort rule: start playback at a low volume. A new adapter can expose a different device volume setting than the one used previously.

Compatible devices and systems

Verified compatibility class: Bluetooth phones and tablets as sources; car AUX, powered speakers, receivers, amplifiers and wired headphones as 3.5mm output destinations.

Connector first

Confirm the exact male/female connector, TRS/TRRS contact count and input/output direction. Brand name alone does not prove fit.

Host capability

For USB-C, Lightning or Bluetooth products, the host must support the relevant audio function. For passive cables, both endpoints must already provide analogue audio.

Headset standard

CTIA and OMTP four-pole wiring are not interchangeable in every product. Inline button behaviour can also differ by phone, headset and operating system.

Cases and recessed sockets

A protective case, recessed jack or closely spaced panel can prevent full seating even when the nominal connector matches.

What this product does

  • Provides the exact Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging connection described for SKU 70303.
  • Receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones.
  • Uses the verified build: compact black rechargeable Bluetooth 5.0 receiver with physical controls, status LED, built-in microphone, 3.5mm audio socket and Micro-USB charging port.
  • Supports the compatible device class stated on the exact UGREEN India page and reconciled exact live media.
  • Keeps buying guidance tied to the exact SKU rather than borrowing capabilities from a related cable family.

What this product does not do

  • receiver only—not a Bluetooth transmitter; not an FM transmitter; Micro-USB is for charging, not USB audio; does not add Bluetooth to a television output.
  • It does not guarantee louder sound, remove source noise or repair worn sockets, damaged cables or incompatible wiring.
  • It does not create independent audio channels, mixing, electrical isolation or professional balanced conversion unless explicitly stated—which this product is not.
  • It is not a power cable, charger, video adapter or networking accessory.
  • It does not prove compatibility merely because another device has a visually similar port.

What to do

Match the exact SKU

Use 70303 only when Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging matches the required direction.

Seat connectors fully

Push straight into clean sockets while equipment volume is low. A half-seated plug is a common cause of missing channels or microphone failure.

Test each function

Check stereo left/right, microphone, calls and controls separately; not every contact or button applies to every product.

Protect device ports

Leave slack, avoid side load and disconnect by the housing so the small audio socket is not used as a lever.

What not to do

Do not force a plug

Stop if the connector does not align or seat. Check case clearance, debris, plug diameter and male/female direction.

Do not assume TRS equals TRRS

Count the contacts and confirm stereo-only versus headset microphone/control requirements before connecting.

Do not pull the cable

Grip the connector housing. Pulling, twisting or sharply folding the cable can damage conductors and device sockets.

Do not connect live at high volume

Lower or mute amplification before changing analogue connections to avoid pops, feedback or unexpectedly loud sound.

Warnings and limitations

Hearing safety: begin at low volume and limit exposure. An adapter does not provide hearing protection.

Compatibility: receiver only—not a Bluetooth transmitter; not an FM transmitter; Micro-USB is for charging, not USB audio; does not add Bluetooth to a television output.

Environment: keep connectors dry, clean and away from extreme heat. Do not use a damaged or corroded plug.

Vehicles: pair, route and adjust controls while parked. Hands-free hardware does not remove the need to follow local driving and phone-use laws.

Technical specifications

Brand / SKU UGREEN 70303
Product role receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones
Connector path Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging
Verified build compact black rechargeable Bluetooth 5.0 receiver with physical controls, status LED, built-in microphone, 3.5mm audio socket and Micro-USB charging port
Wireless role Bluetooth audio receiver only
Bluetooth version 5.0
Listed wireless range Up to 10m in suitable open conditions
Simultaneous source connections Up to 2 paired Bluetooth devices
Listed playtime Up to 9 hours
Listed standby time Up to 300 hours
Listed charging time About 2 hours
Charging input Micro-USB
Audio output 3.5mm analogue
Microphone Built in for supported calls
Exact-gallery audio figures CVC 8.0; distortion <0.1%; SNR >90dB
Colour Black

Selection guidance

1. Identify the job

Receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones.

2. Check direction

Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging.

3. Check contact standard

Decide whether the requirement is stereo TRS, CTIA headset TRRS, Bluetooth reception, USB Audio or Lightning audio.

4. Check limitations

receiver only—not a Bluetooth transmitter; not an FM transmitter; Micro-USB is for charging, not USB audio; does not add Bluetooth to a television output.

UGREEN 70303 Exact live media selected after capability and connector review
Exact live media selected after capability and connector review

Research reconciliation: Exact page and media agree on Bluetooth 5.0 receiver-only operation, dual-device pairing, 10m range, 9-hour playback, 300-hour standby, 2-hour charging and package contents. Claims are stated as listed maxima, not guaranteed in every car or room.

Troubleshooting

No audio

Confirm the source output, destination input and operating-system output selection. Reseat both ends with any obstructing case removed.

One channel only

Lower volume, cleanly reseat the plug and test with another known-good headphone/source. A partially inserted TRS/TRRS plug often drops a channel.

Microphone missing

Verify this exact SKU carries a microphone path, then check CTIA/OMTP wiring, input selection, app permissions and mute controls.

Buzz or crackle

Keep connections away from power noise, stop cable movement, clean dry plugs and test components one at a time to identify a worn socket or cable.

Controls behave oddly

Device and headset manufacturers can map inline buttons differently. Remove parallel splitters, confirm the standard and test basic audio before controls.

Level is too low

Check source and destination volume independently. Passive cables do not amplify; digital adapters still depend on host volume, DAC output and headphone load.

Package contents

1 × Bluetooth receiver, 1 × 3.5mm male-to-male adapter, 1 × USB charging cable, 1 × user guide

No phone, computer, headphones, car stereo, speaker, charger or additional adapter is included unless explicitly named above.

Product-specific FAQ

What is UGREEN 70303 designed to do?

Receives Bluetooth audio from a phone or tablet and feeds it into a 3.5mm AUX input, speaker, amplifier or compatible wired headphones.

Which connector direction does it use?

Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging. Match both ends before purchase.

Does it need a driver or separate power?

It has a rechargeable battery and pairs through the source device Bluetooth settings; no special app is identified.

Will microphone and inline controls work?

Calls use the receiver’s built-in microphone, not a microphone in the connected AUX destination.

Can I use it with a phone case?

Only if the plug housing can seat fully. A deep or narrow case opening can block complete insertion; never force the connector.

Does it improve audio quality or volume?

It provides the documented connection. Real noise, level and fidelity depend on the source, destination, file, amplification, socket condition and environment; it is not a universal amplifier or sound enhancer.

Can it be used as a microphone adapter?

No microphone path is provided by this stereo-only cable.

What should I check if sound comes from one side?

Lower volume, push each plug fully into a clean socket, remove an obstructing case and test each source/headphone separately. A half-seated TRS/TRRS plug commonly loses a channel.

Is it suitable for studio, stage or balanced audio?

It is a consumer audio accessory, not presented as a balanced professional interface, isolated splitter or stage-rated installation cable.

Can I connect extra adapters or splitters?

Possibly, but each extra joint can add fit, wiring and signal-level uncertainty. Check TRS/TRRS standard and direction at every step, then test at low volume.

What is included in the package?

1 × Bluetooth receiver, 1 × 3.5mm male-to-male adapter, 1 × USB charging cable, 1 × user guide.

Exact-model check before ordering

Match SKU 70303, Bluetooth wireless input to 3.5mm analogue audio output, with Micro-USB charging, Portable receiver and the stated compatibility boundary. Similar UGREEN audio cables can differ in TRS/TRRS contacts, direction, digital conversion, microphone support and colour.

SKU 70303Portable receiverBlack

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