---
product_id: 648806985
title: "C81-PC"
brand: "avantree"
price: "7999 kr"
currency: ISK
in_stock: null
reviews_count: 8
category: "Avantree"
url: https://www.desertcart.is/products/648806985-c81-pc
store_origin: IS
region: Iceland
---

# Bluetooth 5.3 low latency ≤55ms 30m / 100ft extended wireless range aptX-Adaptive & HD 24-bit audio C81-PC

**Brand:** avantree
**Price:** 7999 kr
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Elevate your workspace with flawless wireless audio—ditch the wires, keep the edge.

## Quick Answers

- **What is this?** C81-PC by avantree
- **How much does it cost?** 7999 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/648806985-c81-pc)

## Best For

- avantree enthusiasts

## Why This Product

- Trusted avantree brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Crystal-Clear Calls:** Built-in mic support lets your Bluetooth headset handle meetings flawlessly.
- • **Plug & Play Freedom:** No drivers or software needed—just USB-C and go wireless instantly.
- • **Zero Lag Experience:** Ultra-low latency keeps audio perfectly synced for work, music, and video.
- • **Audiophile-Grade Sound:** Qualcomm chipset delivers rich 24-bit aptX-Adaptive and HD audio quality.
- • **Long-Distance Listening:** Enjoy stable Bluetooth connection up to 30 meters away—move freely without dropouts.

## Overview

The Avantree C81-PC is a USB-C Bluetooth 5.3 adapter designed for PC and Mac users seeking high-fidelity wireless audio with aptX-Adaptive, aptX-HD, and low latency support. It enables hassle-free, driverless connections to Bluetooth headphones and earbuds, including microphone support for calls and meetings. With a Qualcomm chipset, it delivers 24-bit dynamic sound and a stable connection up to 30 meters, making it ideal for professionals demanding seamless audio performance across platforms including Linux.

## Description

desertcart.com: Avantree C81-PC - USB-C Bluetooth 5.3 Adapter Dongle for PC & Mac, with aptX-Adaptive & Low Latency, Wireless Audio Transmitter to Bluetooth Headphones & Earbuds for Computer Desktop Music Work Calls : Electronics

Review: Works perfectly with Linux! - If you’re experiencing choppy Linux audio, especially with a Realtek Bluetooth chipset, stop fighting with BlueZ and consider replacing the Bluetooth hardware entirely with a USB audio-to-Bluetooth transmitter. My PC has a Realtek Bluetooth chipset on the internal sound card, which has been a persistent source of audio problems on Linux. The most noticeable issue was music skipping in Spotify, along with intermittent stutters and lost audio frames. After far too much troubleshooting and frustration, I finally looked for a clean hardware solution. Imagine installing a completely new sound card just by plugging in a USB dongle. That’s essentially what I did. I purchased the Avantree C81-PC Bluetooth transmitter and the Avantree Audition 3 over-ear headphones, and they work perfectly. Setup was truly plug-and-play. No drivers, no configuration, no BlueZ issues, and absolutely no hassle. I just plugged in the adapter, selected it as my audio output, and music played flawlessly. I’m genuinely impressed. This isn’t an advertisement. I have no affiliation with Avantree, and before this week I had never even heard of the company. I’m simply sharing a practical solution for anyone struggling with Bluetooth audio under Linux—especially if you have a Realtek chipset and experience skipping or playback instability. Why this works Instead of relying on the internal Realtek Bluetooth radio, the Avantree adapter behaves as a USB audio device and handles Bluetooth transmission in hardware. This completely bypasses the Linux Bluetooth stack, kernel drivers, Realtek firmware, BlueZ profiles, and related audio quirks. If your audio problems come from chipset or driver instability—this approach simply eliminates them. Avantree C81-PC (Key Features) Microphone support: Your Bluetooth headset’s mic works in meetings and calls. High-definition audio: Supports aptX-Adaptive, aptX-HD, and aptX-LL (low latency). No perceptible delay: Perfectly synced audio with compatible headphones. Long range: Advertised up to 30 meters. It comes with a USB-C to USB-A adapter and is compatible with PC, Mac, and Linux. Avantree Audition 3 (Headphones) Excellent comfort and battery life aptX Adaptive / HD support for improved fidelity “Clear Voice Mode” for spoken content Wireless charging dock included Lightweight and comfortable for long use Any other headphones or earbuds that support compatible aptX codecs will also work well with the C81-PC. Bottom Line If you’re struggling with choppy audio, stuttering, or Spotify skipping under Linux and you suspect a Realtek Bluetooth chipset is involved, a hardware USB audio transmitter is a highly effective workaround. In my case, the difference was immediate and dramatic. This may be the solution you’ve been looking for.
Review: Excellent Linux performance, shows up as a USB headset - Works great! Bought this adapter because of a new gaming laptop where the bluetooth only works under Windows, not Linux. The adapter is detected as a pair of headphones, the system simply treats it as a USB audio device, and doesn't care about the bluetooth aspect. That's a bit of a black box, but the LED at least provides some guidance. Press the pairing button on the adapter and on your headphones, put them together, and they'll pair. Have tried it with a cheap-ass bluetooth headset, which gets a quality downgrade, and with my regular high-end receiver and studio monitors, which connect using aptX. Range is excellent, sound quality matches the protocol used between the devices. When unplugged, the adapter does not remember next time it's plugged in, as far as I can tell. You just have to pair again. But it does carry over across multiple reboots, including across operating systems.

## Features

- [HASSLE-FREE CONNECTIONS] Connect your Bluetooth headphones (excluding Momentum 4 headphones and other 2.4g headphones or speakers) to your PC or Mac with the C81-PC adapter and enjoy high-fidelity audio with no wires, drivers, or software required. NOTE: For use with PS5 and other consoles, consider the C81-Gaming for best results.
- [MICROPHONE SUPPORT] Utilize your headphones’ built-in microphone in meetings or calls when using the C81-PC with a computer or laptop.
- [HIGH-DEFINITION AUDIO] Equipped with a Qualcomm chipset that supports aptX-LL, HD, and Adaptive, the C81-PC delivers high-quality 24-bit dynamic audio through a stable, energy-efficient connection. (For the best sound experience, please use headphones that support the same aptX codecs; otherwise, audio will default to SBC with standard quality.)
- [NO AUDIO DELAYS] When used with headphones that support aptX-Low Latency or aptX-Adaptive, a latency of 55ms or less provides perfectly synced audio & visual.
- [EXTENDED RANGE] Listen from afar at a range of up to 100ft / 30m.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CZLHXMMW |
| Best Sellers Rank | #61 in Bluetooth Network Adapters |
| Brand | Avantree |
| Built-In Media | PC audio adapter, USB A to Type C Converter, Manual |
| Color | White for PC |
| Compatible Devices | Desktop, Laptop, PC, computer |
| Connector Type | USB Type C |
| Current Rating | 1 Amps |
| Customer Reviews | 4.0 out of 5 stars 1,089 Reviews |
| Finish | Qualcomm |
| Finish Type | Qualcomm |
| Item Weight | 3 Grams |
| Manufacturer | Avantree |
| Model Number | BTDG-C81 |
| Number of Items | 1 |
| Number of Ports | 1 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Specific Uses For Product | Bluetooth connected with Bluetooth Headset / Headphones / Earbuds / Speaker, excluding Momentum 4 headphones and other 2.4g headphones or speakers Specific Uses For Product Bluetooth connected with Bluetooth Headset / Headphones / Earbuds / Speaker, excluding Momentum 4 headphones and other 2.4g headphones or speakers See more |
| Unit Count | 1.0 Count |
| Warranty Description | Warranty - 24 months (product registration to cover first 12m return shipment cost) | Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support |

## Product Details

- **Compatible Devices:** Desktop, Laptop, PC, computer
- **Specific Uses For Product:** Bluetooth connected with Bluetooth Headset / Headphones / Earbuds / Speaker, excluding Momentum 4 headphones and other 2.4g headphones or speakers
- **Connector Type:** USB Type C
- **Color:** White for PC
- **Brand:** Avantree

## Images

![C81-PC - Image 1](https://m.media-amazon.com/images/I/418KOWFQaJL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works perfectly with Linux!
*by H***R on December 7, 2025*

If you’re experiencing choppy Linux audio, especially with a Realtek Bluetooth chipset, stop fighting with BlueZ and consider replacing the Bluetooth hardware entirely with a USB audio-to-Bluetooth transmitter. My PC has a Realtek Bluetooth chipset on the internal sound card, which has been a persistent source of audio problems on Linux. The most noticeable issue was music skipping in Spotify, along with intermittent stutters and lost audio frames. After far too much troubleshooting and frustration, I finally looked for a clean hardware solution. Imagine installing a completely new sound card just by plugging in a USB dongle. That’s essentially what I did. I purchased the Avantree C81-PC Bluetooth transmitter and the Avantree Audition 3 over-ear headphones, and they work perfectly. Setup was truly plug-and-play. No drivers, no configuration, no BlueZ issues, and absolutely no hassle. I just plugged in the adapter, selected it as my audio output, and music played flawlessly. I’m genuinely impressed. This isn’t an advertisement. I have no affiliation with Avantree, and before this week I had never even heard of the company. I’m simply sharing a practical solution for anyone struggling with Bluetooth audio under Linux—especially if you have a Realtek chipset and experience skipping or playback instability. Why this works Instead of relying on the internal Realtek Bluetooth radio, the Avantree adapter behaves as a USB audio device and handles Bluetooth transmission in hardware. This completely bypasses the Linux Bluetooth stack, kernel drivers, Realtek firmware, BlueZ profiles, and related audio quirks. If your audio problems come from chipset or driver instability—this approach simply eliminates them. Avantree C81-PC (Key Features) Microphone support: Your Bluetooth headset’s mic works in meetings and calls. High-definition audio: Supports aptX-Adaptive, aptX-HD, and aptX-LL (low latency). No perceptible delay: Perfectly synced audio with compatible headphones. Long range: Advertised up to 30 meters. It comes with a USB-C to USB-A adapter and is compatible with PC, Mac, and Linux. Avantree Audition 3 (Headphones) Excellent comfort and battery life aptX Adaptive / HD support for improved fidelity “Clear Voice Mode” for spoken content Wireless charging dock included Lightweight and comfortable for long use Any other headphones or earbuds that support compatible aptX codecs will also work well with the C81-PC. Bottom Line If you’re struggling with choppy audio, stuttering, or Spotify skipping under Linux and you suspect a Realtek Bluetooth chipset is involved, a hardware USB audio transmitter is a highly effective workaround. In my case, the difference was immediate and dramatic. This may be the solution you’ve been looking for.

### ⭐⭐⭐⭐⭐ Excellent Linux performance, shows up as a USB headset
*by M***T on January 6, 2026*

Works great! Bought this adapter because of a new gaming laptop where the bluetooth only works under Windows, not Linux. The adapter is detected as a pair of headphones, the system simply treats it as a USB audio device, and doesn't care about the bluetooth aspect. That's a bit of a black box, but the LED at least provides some guidance. Press the pairing button on the adapter and on your headphones, put them together, and they'll pair. Have tried it with a cheap-ass bluetooth headset, which gets a quality downgrade, and with my regular high-end receiver and studio monitors, which connect using aptX. Range is excellent, sound quality matches the protocol used between the devices. When unplugged, the adapter does not remember next time it's plugged in, as far as I can tell. You just have to pair again. But it does carry over across multiple reboots, including across operating systems.

### ⭐ Does not work well with Sennheiser Momentum 4 headphones
*by D***6 on April 23, 2025*

I purchased this device over the weekend and it arrived yesterday. Today, I have spent a couple hours trying to use it with my laptop and Sennheiser Momentum 4 headphones. The headphones connect easily enough to the dongle, no problems there. The audio through various different apps (Youtube and Twitch via Chrome, Apple Music desktop app) crackles and drops out consistently. I am comfortable doing troubleshooting, so I did some googling and also went to the Avantree website, and proceeded to follow the instructions that I found, which included changing power settings, trying different ports, disabling settings in the Sennheiser headphone app, disconnecting from all nearby devices, factory defaulting the dongle and the headphones, updating firmware (which doesn't work very well, the program for that probably needs to be updated a little, it hung up or just wouldn't start almost every time I tried to run it), and reinstalling the drivers for the dongle itself. After going back and doing some searching in the reviews on here, this model seems to not work very well with the Sennheiser Momentum 4 headphones. I would not recommend it if you are trying to use them with these headphones. I emailed the Avantree support this morning through their website and have yet to hear back, hopefully they will respond, but I am planning on sending the dongle back and trying something different. May change my rating to 2 stars if the support response is helpful, but for now, I will leave it at a 1 star.

## Frequently Bought Together

- Avantree C81-PC - USB-C Bluetooth 5.3 Adapter Dongle for PC & Mac, with aptX-Adaptive & Low Latency, Wireless Audio Transmitter to Bluetooth Headphones & Earbuds for Computer Desktop Music Work Calls
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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-02*