QCC Dongle Pro2
Flagship Bluetooth Transmitter
A flagship dongle built for the next generation of wireless audio.
Premium Bluetooth Audio, Beyond Platform Limitations
Whether you use an iPhone, iPad, Mac, Windows PC, Switch, or PS5, or premium Bluetooth headphones from Sony, Bowers & Wilkins, Sennheiser, or Bose, the QCC Dongle series overcomes your devices’ native Bluetooth audio limitations to deliver better sound quality, lower latency, and more stable wireless audio.
High-quality wireless audio has long been constrained by device platforms. Differences in Bluetooth codec support, connection stability, and latency prevent premium wireless headphones from reaching their full potential. Questyle developed the QCC Dongle series to make advanced wireless audio capabilities independent of the host platform. Through a simple, reliable, plug-and-play external audio interface, it provides consistently high-quality wireless audio output across iPhone, iPad, Mac, Windows, Switch, PS5, and other devices.
It goes beyond simply enabling Bluetooth connectivity. By removing platform limitations on wireless audio, it allows users to enjoy consistently high sound quality, low latency, and stable connections across different devices.
QCC Dongle Pro2: An Upgrade Across the Experience
QCC Dongle Pro2 is not positioned as a “more expensive QCC Dongle Pro,” but as a comprehensive upgrade within the existing pricing structure.
Compared with the previous-generation QCC Dongle Pro, it retains the same familiar operation and form factor while taking a further step toward the next generation of Bluetooth audio. It evolves from an LDAC / aptX high-definition transmitter into a flagship wireless audio dongle built for the future.
A High-Definition Audio Upgrade for iPhone Users
The iPhone’s native Bluetooth supports only AAC and SBC codecs and cannot transmit high-definition Bluetooth formats such as LDAC, aptX, or LHDC. Even when paired with premium wireless headphones that support these codecs, it cannot fully realize their sound quality potential.
QCC Dongle Pro2 brings professional-grade, high-definition Bluetooth output to iPhone, iPad, and Mac. With support for high-quality wireless audio codecs including LDAC, aptX, and LHDC, it unlocks the full performance of your headphones. Apple MFi certification also provides reliable assurance in system compatibility, power management, and compatibility with future iOS updates, helping ensure stable, long-term use.
Actual sound quality depends on whether the receiving headphones support the corresponding codec.
Unlock the Full Potential of Premium LDAC Headphones
Even with premium headphones that support LDAC, users are often unable to transmit high-bitrate audio reliably because of the Bluetooth limitations of their phones, computers, or game consoles. This prevents their headphones from delivering their full performance.
QCC Dongle Pro2 supports high-quality LDAC audio transmission, delivering stable, high-bitrate wireless audio that brings out the resolution and fine detail of premium headphones from Sony and other brands, bringing wireless sound closer to a lossless listening experience.
LDAC’s high-bitrate mode also depends on the receiving headphones’ capabilities and the stability of the wireless environment.
Better Bluetooth Sound and Stability for Computers
Most computers, particularly Windows PCs and some Macs, have limitations in Bluetooth specifications, native codec support, and connection stability that affect wireless headphone sound quality and usability.
With plug-and-play operation, QCC Dongle Pro2 provides professional-grade wireless audio output for computers. It supports high-quality Bluetooth codecs including LDAC, aptX, aptX HD, and aptX Adaptive, with actual support depending on the combination of devices used. Without requiring additional drivers, it significantly improves sound quality, connection stability, and latency performance, making higher-quality wireless audio easy to enjoy on your computer.
Low-Latency Gaming on Switch and PS5
For PS5, Switch, and handheld gaming users, a good wireless gaming experience depends on more than Bluetooth availability. Audio latency, connection stability, and device compatibility directly affect audio-video synchronization and gameplay.
QCC Dongle Pro2 supports low-latency codec technologies such as aptX Adaptive. When paired with compatible headphones, it effectively reduces latency and improves connection stability, bringing the wireless gaming experience closer to that of wired headphones.
It also supports LE Audio’s low-latency capabilities and high-definition voice uplink. With compatible devices, these features further improve wireless transmission efficiency and voice communication, preparing it for the next generation of gaming audio.
aptX Adaptive: latency as low as 48 ms
LE Audio: latency as low as 20 ms when the receiving device supports LE Audio low-latency mode
Note: Achieving the stated aptX Adaptive low latency requires headphones built on the latest Qualcomm® Gen 2 Sound Platforms that support the aptX Adaptive codec. LE Audio ultra-low latency likewise requires the receiving headphones to support LE Audio low-latency mode. Standard Bluetooth headphones cannot achieve these latency levels.
Bring Wireless Freedom to Wired Hi-Fi
For users with premium wired Hi-Fi headphones or desktop Hi-Fi systems, traditional wired equipment delivers excellent sound quality, but cable connections limit flexibility in how and where it can be used.
QCC Dongle Pro2 can be paired with devices such as M18i Max to transmit high-quality audio wirelessly to a Hi-Fi system. It adds wireless capability to a wired setup while preserving sound quality, giving you greater freedom to enjoy high-quality listening.
Forward-Looking Support for the Next Generation of Bluetooth Audio
LE Audio: The Next Generation of Bluetooth Audio Architecture
QCC Dongle Pro2 already supports the LE Audio standard, providing forward-looking compatibility with the next generation of Bluetooth audio. Introduced by the Bluetooth SIG, LE Audio is a new generation of low-power audio standards that represents the continued evolution of Bluetooth audio in transmission efficiency, connection architecture, and power consumption.
With this support, QCC Dongle Pro2 is ready to work with future generations of headphones and speakers as they adopt the technology.
LHDC-V5 High-Resolution Audio Codec
The LHDC-V5 high-definition audio codec supports bitrates of up to 900 kbps, offering substantially better detail resolution and dynamic range than conventional Bluetooth codecs.
QCC Dongle Pro2 fully supports this high-definition codec. Paired with headphones that support LHDC, it delivers stable, high-fidelity wireless audio, faithfully reproducing rich musical detail and soundstage depth. Across gaming, movies, and other entertainment, it provides a clearer, more immersive, and more spacious listening experience of professional quality.
Auracast™ | One-to-Many Audio Broadcasting
Opening Up Shared Listening Experiences
QCC Dongle Pro2 supports Auracast™ audio broadcasting, taking wireless audio beyond traditional one-to-one connections to one-to-many sharing and expanding the ways Bluetooth audio can be used.
As the ecosystem of Auracast™-compatible devices continues to grow, the technology has the potential to bring value to more settings and create new possibilities for wireless audio sharing. Future applications include:
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Home: Stream audio from a TV or phone to multiple listeners’ headphones simultaneously.
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Offices and Businesses: Broadcast speech to multiple receivers in meeting rooms, exhibition halls, and retail stores.
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Public Spaces: Provide dedicated audio broadcasts in museums, airports, cinemas, and other venues.
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Hearing Assistance: Broadcast sound directly to hearing devices for an improved listening experience.
Auracast™ requires support on both the transmitting and receiving devices. Support on QCC Dongle Pro2 alone is not sufficient; it must be used with headphones or audio devices that also support Auracast™ reception.
MFi Certification
The Foundation for Reliable Compatibility with the Apple Ecosystem
The iPhone natively supports only AAC and SBC codecs and cannot transmit high-definition Bluetooth formats such as LDAC, aptX, or LHDC. Even when paired with premium wireless headphones, it cannot fully unlock their performance.
QCC Dongle Pro2 is Apple MFi certified for reliable, long-term compatibility with iPhone, iPad, and Mac. It meets Apple ecosystem standards for system compatibility, power management, and compatibility with iOS updates, ensuring stable use over time.
This makes QCC Dongle Pro2 an advanced wireless audio output device for the Apple ecosystem, unlocking the full sound quality potential of premium wireless headphones.
Dedicated App
Making Complex Protocols Easy to Manage
QCC Dongle Pro2 comes with a dedicated app that supports device discovery, connection management, status display, and firmware updates, making Bluetooth device management more intuitive and efficient.
It also allows users to switch audio codecs and adjust sound performance to suit their headphones or listening scenarios, creating a smarter wireless audio experience with greater control.
Bluetooth 6.1 for Stable Connections in Challenging Environments
QCC Dongle Pro uses Bluetooth 5.4, while QCC Dongle Pro2 upgrades to Bluetooth 6.1. With stronger interference resistance in challenging environments, it effectively reduces stuttering and disconnections, improves wireless audio transmission stability, and provides a more reliable transmission foundation for next-generation audio technologies such as LE Audio and Auracast™.
Qualcomm Snapdragon Sound™ Certification
Assurance of High Sound Quality and Low Latency
Questyle has maintained a close, long-standing technical partnership with Qualcomm, continuously advancing wireless audio research and development.
QCC Dongle Pro2 features Snapdragon Sound™ technology and Bluetooth 6.1, with support for high-quality Bluetooth audio codecs including aptX, aptX HD, aptX Adaptive, and aptX Lossless. Together, these deliver improvements in sound quality, latency, and connection stability.
With Snapdragon Sound™ certification, QCC Dongle Pro2 meets Qualcomm’s standards for wireless audio performance, connection reliability, and ecosystem compatibility, delivering a stable, high-quality wireless audio experience.
Sony LDAC Certification
As a Sony LDAC member, Questyle remains committed to delivering high-quality wireless audio experiences.
QCC Dongle Pro2 supports Sony LDAC technology at bitrates of up to 990 kbps. By transmitting more audio data than conventional Bluetooth codecs, it reproduces musical detail more faithfully. Paired with LDAC-compatible headphones or speakers, it enables stable, high-quality wireless audio output from iPhone, other smartphones, tablets, and computers.
Compatibility testing has been completed with mainstream LDAC headphones. For the best compatibility and sound quality, we recommend choosing officially recommended compatible models.
Smart Indicator Light with Real-Time Feedback
Connection and Codec Status at a Glance
The indicator light clearly displays device connection status and the active codec in an intuitive way. Users can check essential information without complicated steps, making Bluetooth devices easier and more convenient to use.
