Exact model 45009
Listen Through 3.5mm AUX While Charging a USB-C Device
UGREEN 45009 is a 2.5ft digital-audio cable with a built-in DAC and a dedicated charging branch. It links a compatible USB-C phone, tablet or computer to a 3.5mm AUX input while drawing power from either a USB-C PD charger or a USB-A QC charger.
Product overview
Overview
What model 45009 is designed to do
Model 45009 solves one specific problem: a USB-C source device needs to play through an analogue 3.5mm AUX input and charge at the same time. The main USB-C male plug connects to the phone, tablet or computer; the 3.5mm male plug connects to a car stereo, powered speaker, receiver or other AUX input.
At a glance
Key features
Three ends, two functions and one power source at a time
Main USB-C male
Connects to the phone, tablet or computer. The device must support digital USB-C audio output and the charging path required for simultaneous use.
3.5mm TRS male
Connects to an AUX input on a car stereo, powered speaker, amplifier or other analogue audio equipment.
USB-C power input
Connect the branch marked IN to a USB-C PD charger for a listed maximum input of 60W.
Tethered USB-A adapter
Fits the charging branch for a USB-A QC source, with a listed maximum input of 18W. It is not a data adapter.
Simultaneous listening and power
Keep the USB-C device charging while its audio plays through AUX
Connect the main USB-C plug to the source and the 3.5mm plug to the audio system, then connect the separate power branch to a compatible charger. The design avoids choosing between a USB-C audio adapter and a charging cable during a drive or long listening session.
- Use USB-C PD or USB-A QC power, not both at once.
- A suitable charger is required and is not included.
Digital-to-analogue audio
A built-in DAC feeds traditional 3.5mm AUX inputs
The source sends compatible digital audio through USB-C. Model 45009 converts it to analogue stereo for the 3.5mm TRS plug, with an official maximum format of 48kHz/16-bit.
- Select the USB audio device in system settings if the source does not switch automatically.
- Start with low volume before raising the source and stereo levels.
Two charger interfaces
Choose USB-C PD up to 60W or USB-A QC up to 18W
The power branch ends in USB-C male and includes a tethered USB-A male adapter. Insert the USB-C plug directly into a compatible USB-C PD charger for the higher listed ceiling, or fit the USB-A adapter for a compatible QC charger or car charger.
- 60W is the maximum listed USB-C PD input, subject to source-device acceptance.
- 18W is the maximum listed USB-A QC input, subject to protocol negotiation.
Real-world applications
Use scenarios
The setups this specialised cable is built for
Car stereo AUX
Play navigation, podcasts or music from a compatible USB-C phone through a 3.5mm vehicle input while powering the phone from a USB-C or USB-A car charger.
Powered speakers
Connect a USB-C tablet or computer to a speaker's 3.5mm AUX input and use the charging branch during longer playback.
Home stereo
Feed a receiver or amplifier with a 3.5mm AUX input from a compatible USB-C source while keeping the source device powered.
Device and system fit
Compatible devices and systems
Compatibility depends on USB-C digital audio, not connector shape alone
USB-C iPhone and iPad
Recent USB-C iPhone and iPad models can be used when they expose compatible USB digital audio and charging behaviour.
Android phones and tablets
Compatible Galaxy, Pixel and other USB-C devices must support digital audio output. Some Android devices may need USB audio or OTG settings enabled.
USB-C computers
A compatible laptop can output audio through the built-in DAC; 60W may not meet every notebook's charging requirement.
Connection workflow
Setup and usability guidance
Connect audio first, then add one charging source
- Turn the car stereo, speaker or amplifier volume down before connecting.
- Insert the 3.5mm TRS plug fully into the receiving AUX input.
- Connect the main USB-C plug—the one intended for the phone/computer—to the source device.
- If audio does not switch automatically, select the USB audio output in the device settings.
- For charging, connect the branch marked IN directly to a USB-C PD charger, or fit its tethered USB-A adapter and connect to a USB-A QC charger.
Realistic performance
Separate audio format, charging input and real-world result
The DAC's 48kHz/16-bit ceiling and the charger's 60W/18W input ceilings describe different parts of the product. Audio quality and charging rate are independently limited by the connected equipment.
Audio
Up to 48kHz/16-bit digital conversion. The downstream AUX input and amplifier determine volume, noise floor and final sound.
USB-C charging
Up to 60W PD input, provided the charger and source device negotiate a supported profile. Actual device draw can be much lower.
USB-A charging
Up to 18W QC input through the tethered adapter. Unsupported devices fall back to a mutually supported rate.
Function scope and boundaries
Function scope and boundaries
What this product does
- Convert compatible USB-C digital audio to a 3.5mm analogue stereo output.
- Play audio while the source device receives power.
- Accept up to 60W through its USB-C PD charging branch.
What this product does not do
- It does not transfer USB data or sync files.
- It does not provide HDMI, video output, Ethernet or hub ports.
- It does not guarantee microphone, call-control or inline-button support through the 3.5mm TRS plug.
Important limitations
Check before buying
Confirm these points before buying or connecting model 45009:
- The source device must output compatible digital audio over USB-C.
- The receiving equipment needs a 3.5mm analogue AUX input; this cable is male at the audio end.
- For 60W charging, use a compatible USB-C PD charger and confirm the source device accepts the required profile.
- For USB-A charging, the listed ceiling is 18W QC, not 60W.
Good practice
Good practice
What to do
- Lower volume before connecting the AUX plug and raise it gradually.
- Use the main USB-C plug for the source device and the branch marked IN only for power.
- Choose one power connector—USB-C or USB-A—according to the charger.
What not to do
- Do not connect USB-C and USB-A charging sources simultaneously.
- Do not connect a charging branch to a computer expecting file transfer.
- Do not force the 3.5mm plug into an incompatible, damaged or obstructed socket.
Safe operation
Warnings and limitations
Warning 1
Set a safe listening level. Prolonged high volume can damage hearing, regardless of the cable or source device.
Warning 2
In a vehicle, complete connections while parked and route the cable so it cannot interfere with driving controls or visibility.
Warning 3
Disconnect and stop use if a connector, DAC housing or charging branch becomes unusually hot, loose or damaged.
Verified technical details
Technical specifications
| Brand | UGREEN |
|---|---|
| Model / SKU | 45009 |
| Product type | USB-C digital-audio to 3.5mm AUX cable with charging branch |
| Source connector | USB-C male |
| Audio connector | 3.5mm TRS male |
| USB-C charging input | Up to 60W Power Delivery |
| USB-A charging input | Up to 18W Quick Charge through tethered adapter |
| DAC audio format | Up to 48kHz / 16-bit |
| Data transfer | Not supported |
| Cable length | 2.5ft, approximately 0.76m |
| Construction | Braided nylon cable; aluminium-alloy connector housings |
In the box
Package contents
- UGREEN 45009 USB-C to 3.5mm AUX audio-and-charging cable with tethered USB-A power adapter × 1
A USB-C wall charger, USB-A charger, car charger, headphones, speaker and source device are not included.
FAQ
Product-specific FAQ
What connects to my phone or tablet?
Use the main USB-C male plug intended for the source device. The separate branch marked IN is for a charger, not the phone.
Can I listen and charge at the same time?
Yes. Connect the main USB-C plug to the source, the 3.5mm plug to the AUX input and one charging input to a compatible charger.
How do I get the listed 60W charging input?
Connect the branch's USB-C male plug to a compatible USB-C PD charger. The source device still decides how much power it accepts.
What is the USB-A plug for?
It is a tethered adapter for the charging branch, allowing connection to a compatible USB-A QC charger with a listed input ceiling of 18W.
Can I use USB-C and USB-A power together?
No. They are two alternatives for the same charging input path. Use only one power source at a time.
Does it transfer data?
No. UGREEN explicitly lists no data transmission. The USB connectors are used for source audio/power and charging input, not file sync.
Does it support a headset microphone?
Microphone and inline-control support are not verified for this TRS AUX cable, so buy it for stereo playback rather than headset input.
Why is there no sound from my USB-C device?
Confirm the device supports USB digital audio, select the USB audio output if required, reseat the plugs and test the AUX input with another source.
Will it work with a car stereo?
Yes, when the stereo has a working 3.5mm AUX input and the phone supports USB-C digital audio. Use a compatible car charger if simultaneous charging is required.
What audio format does the DAC support?
The exact UGREEN listing states up to 48kHz/16-bit. Final sound also depends on the recording, source, AUX input and sound system.
What is included?
One UGREEN 45009 cable with the main USB-C source plug, 3.5mm male audio plug, USB-C charging branch and tethered USB-A charging adapter.
