Marsno USB C to 3.5mm Headphone and Charger Adapter, 2-in-1 USB Type C to Aux Audio Jack Splitter (PD 60W)
Quick take
This 2-in-1 USB-C dongle lets you keep using wired 3.5mm headphones while charging your phone, with PD charging support up to 60W. It includes a built-in DAC for analog audio output, but it is not a data-transfer adapter, and some headphone call and control features are limited (notably Apple EarPods mic behavior).
Pros and cons
Pros
- Two-in-one design for simultaneous wired audio (3.5mm) and USB-C charging
- PD fast charging support up to 60W, with stable voltage/current signaling
- Built-in DAC for cleaner headphone audio transmission (CTIA-aligned)
- Designed for plug-and-play use, no driver required
Cons
- No data transfer support, it is for audio and power only
- Microphone support is limited, including Apple EarPods 3.5mm mic not supported
- Compatibility is not universal, some OnePlus, Moto, Switch, GoPro, and Amazon Fire Max models may not work
- In-line controls vary, Apple EarPods volume control is not supported
What buyers think
Buyer-review evidence is limited in detail, but available feedback trends toward “it works as intended” for listening through wired headphones while charging, especially for travel or in-car use. Several shoppers also mention the adapter’s build feeling solid and it being straightforward to set up. A minority of reviews describe issues that appeared tied to pairing order or mismatched headphone capabilities, and one report suggests behavior changes when the dongle is used, which improved after switching back to an older adapter. Overall, the pattern points to reliable day-to-day functionality when it is compatible with both your phone and your specific headphones.
What this adapter is for
The Marsno adapter solves a common USB-C annoyance: many phones no longer include a traditional 3.5mm headphone jack, and charging blocks the port you need for headphones. This dongle splits your USB-C port into:
- 3.5mm headphone output for wired earbuds or headphones
- USB-C power to keep charging while you listen
Key features that matter when you shop
Audio output and DAC support
It uses a built-in DAC decoding chip intended to provide stable, higher-quality analog audio transmission and minimize noise artifacts. It follows the CTIA standard for headphone wiring. If your wired headphones depend on a specific jack type, it is important that they match the adapter’s expected CTIA 3.5mm format.
Charging performance (PD 60W)
Charging support is rated up to 60W Power Delivery. That matters if you want more than slow trickle power, particularly for tablets or for keeping momentum during longer sessions. The adapter is also explicit that it does not support QC charging (and some phones may not charge at their highest advertised speed), so your charging setup should use a PD wall charger when you want the best results.
Simultaneous use, but not data transfer
This adapter is meant for listening and charging at the same time. It does not support data transfer, so you cannot use it like a USB accessory for file sync or similar tasks. If you only need audio and power, this is the right category fit.
Controls and microphone limitations
Inline remote control is supported in general, but there are notable limitations. In particular, microphone functionality of Apple EarPods (3.5mm) is not supported, and volume control behavior for Apple’s EarPods is also limited. If you rely on call audio through the headphone mic, plan on using phone speaker or a different wired headset designed for mic support with USB-C adapters.
Compatibility notes (where buyers can get stuck)
This adapter targets “most” USB-C devices, and it lists a wide range of supported iPhone, Samsung Galaxy, Pixel, iPad Pro, and other USB-C models. Still, it includes specific caveats that can affect real-world use:
- Not compatible with all models of OnePlus, Moto, Switch, GoPro, and Amazon Fire Max (use caution if your device is outside the mainstream list)
- Some phones may behave differently depending on whether they can negotiate PD charging cleanly
Setup tips that match buyer experiences
Some users report that the order you plug things in can affect recognition. A practical approach is to connect the adapter to the phone and charging cable first, then connect your headphones so the phone properly detects the audio path. If you ever see the audio not routing correctly, re-check plug order and headphone compatibility (especially CTIA 3.5mm and any call-control expectations).
Pros and cons recap
- Best for: anyone with a USB-C phone or tablet that lacks a 3.5mm jack who wants to use wired headphones while charging, especially during travel, commutes, or long sessions.
- Who should buy: buyers using CTIA-compatible 3.5mm wired headphones and PD chargers who do not require Apple EarPods 3.5mm mic functionality.
- Who should avoid: people who need microphone support through Apple 3.5mm EarPods, or buyers with devices known to be incompatible (certain OnePlus, Moto, Switch, GoPro, and Amazon Fire Max models).
Is it worth it?
If your main goal is simple and immediate, simultaneous wired listening and USB-C charging, this adapter can be a convenient low-cost solution. The biggest “make or break” factors are not the audio quality claims, but compatibility and feature expectations, especially around microphone support and Apple EarPods inline controls. If you match the right phone and headphones and use a PD charger, the buyer feedback suggests it functions smoothly for everyday use.
Alternatives to consider
If you need different capabilities, compare by what you prioritize:
- For true call-mic support: look for USB-C to 3.5mm adapters specifically advertising Apple EarPods mic compatibility or widely supported headset mic behavior.
- For charging only: a USB-C PD charger plus a separate wireless audio setup avoids headphone mic limitations entirely.
- For broader device support: consider a more universally compatible adapter model if you are using a less common device brand or accessory ecosystem.
Price and availability
Check the latest price and shipping options on Amazon using the link below. This product is currently listed as available in the United States on the marketplace.
FAQ
Does this adapter support data transfer?
No. It is designed for audio output to 3.5mm headphones and for USB-C power charging only.
Can I charge my phone and listen through wired headphones at the same time?
Yes. The dongle is built specifically for simultaneous 3.5mm audio and USB-C PD charging.
Does it support fast charging?
It supports Power Delivery charging up to 60W. QC charging is not supported, and some phones may not reach their highest advertised speed if they expect QC or other proprietary charging behavior.
Will Apple EarPods mic and call controls work?
Microphone functionality for Apple EarPods with a 3.5mm plug is not supported, and in-line volume control behavior is also limited for Apple EarPods. Inline remote control is supported generally, but Apple-specific mic expectations may not work.
Is the adapter compatible with all phones and tablets?
It supports a wide range of USB-C devices, but it is not guaranteed to work with every model. Some OnePlus, Moto, Switch, GoPro, and Amazon Fire Max models are specifically noted as not compatible.
Why might my phone not recognize the headphones?
Recognition can depend on headphone type and plug order. If audio does not route correctly, try connecting the adapter to the phone and charging cable first, then plug in the headphones.
Specifications
| Product Title | Marsno USB C to 3.5mm Headphone and Charger Adapter, 2-in-1 USB Type C to Aux Audio Jack Splitter, PD 60W Fast Charging Dongle for iPhone 17/16/15, Galaxy S25/S24/S23, iPad Pro, Pixel (Black) |
|---|---|
| Category | Electronics > Headphones, Earbuds & Accessories > Adapters |
| Brand | Marsno |
| Manufacturer | Marsno |
| Model Number | ZOOAUX 7 |
| Item Weight | 0.02 Pounds |
| Color | Black |
| Compatible Devices | iPhone 17 17 Pro 17 Pro Max Air 16 16 Plus 16 Pro 16 Pro Max 15 15 Plus 15 Pro 15 Pro Max Samsung Galaxy S25 S24 S23 S22 S22+ S22 Ultra S21 S21+ S21 Ultra S20 Ultra S20 Z Flip S20+ S10 S9 S8 Plus, Note 20 10 10+ 9 8, for iPad pro, for iPad mini 6, for Mac book, for pixel 9 8 7 6 5 4 3 2 XL, Huawei Mate 60 50 40 30 20 10 Pro, P60 P30 P20 and more. |
| Specific Uses For Product | Cell Phone, Headphones |
| Connector Type | Auxiliary, USB Type C |
| Number of Ports | 2 |
| Input Voltage | 2 Volts |
| Current Rating | 2 Amps |
| Power Plug Type | Type C |
| Nominal Power | 60 Watts |
| Smart Home Compatibility | Not Smart Home Compatible |
| Finish | Metallic |
| Warranty Type | 18 Month Warranty |
| Package Quantity | 1 |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Mfr Part Number | fhgj |
| Warranty Description | 24-Month |
Available variants
Size
- 100 Pack
- 1 Pack
- 50 Pack
Color
- Black
- Red
- Grey
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