Questyle QCC DONGLE PRO

Questyle QCC Dongle Pro: USB‑C Bluetooth Transmitter

iPhones and iPads stubbornly refuse high‑resolution audio codecs such as LDAC or aptX Adaptive, restricting users to AAC or SBC. This USB‑C Bluetooth transmitter bypasses this limitation by adding support for seven advanced codecs, including Sony’s LDAC, which transmits up to 990 kbps. With this device, Questyle reaches a notable milestone: it is the first lossless Bluetooth transmitter to obtain Apple MFi certification.

A bridge between Apple and high‑resolution audio

With the QCC Dongle Pro, USB‑C Apple devices gain access to the codecs Cupertino natively withholds from them. As an official Sony LDAC partner, Questyle integrates this codec, which approaches CD quality in wireless transmission. The full range of Qualcomm aptX codecs is also included: standard aptX, HD, Adaptive, and Lossless. For devices that do not support any of these formats, SBC and AAC remain available as fallback options.

Apple MFi certification provides a level of compatibility that uncertified transmitters cannot guarantee. iOS updates are unlikely to trigger the dreaded “Accessory Not Supported” message or random disconnections. This certification requires Questyle to meet strict standards in terms of power consumption and system integration.

Compact build for mobile use

The QCC Dongle Pro measures just 10 mm in depth when connected, including 8 mm for the metal USB‑C connector and 2 mm for the plastic shoulder. This minimalist design allows the transmitter to stay plugged in even when a standard protective case is fitted on the phone. The PC + ABS housing with metallic (anthracite gray) finish contains an indicator LED that shows the active codec via a color code: red for LDAC or aptX Adaptive, white for the other aptX variants, blue for SBC.

The 57‑gram weight and the absence of an internal battery simplify daily use. The 37 mA power draw represents around 10% of an iPhone 16’s battery after ten hours of intensive listening in LDAC, a moderate impact for this level of performance.

Gaming and multimedia without latency

Qualcomm Snapdragon Sound technology combined with Bluetooth 5.4 reduces latency to around 48 ms in optimized mode. This nearly imperceptible delay enables precise audio‑video sync when watching movies or during gaming sessions. PlayStation 5 and Nintendo Switch owners (all versions: Lite, standard, OLED) can finally connect their favorite Bluetooth headsets to these consoles, which do not natively handle high‑quality wireless audio.

Game mode, which can be activated via the Questyle app, prioritizes minimal latency. However, this optimization disables bidirectional transmission: voice calls and in‑game team communication are not available in this mode. For co‑op gaming that requires a microphone, this option must be turned off.

App and configuration

The Questyle app (iOS and Android) centralizes pairing and device management. The first connection with Bluetooth headphones or earphones is done through the app, after which the transmitter stores that device’s profile. Several headsets can be registered, and switching from one to another remains quick without having to repeat the full pairing process.

On Windows 10 (version 1803 and later) and macOS, no driver is required. The transmitter appears as a standard audio source in the system settings. The mobile app is still needed for the initial pairing with headsets: you must first configure the QCC Dongle Pro on a smartphone, then move it to the computer, where it will automatically reconnect to stored devices.

Firmware updates are performed directly via the app, allowing Questyle to improve compatibility and performance over time.

Frequently asked questions

Can the QCC Dongle Pro connect to several headsets at the same time?
No, the transmitter only supports one active connection at a time. However, the Questyle app lets you register multiple devices and switch quickly between them without redoing the full pairing each time.

How can I tell which codec is currently in use?
The built‑in LED indicates the active codec: red for LDAC or aptX Adaptive (the high‑resolution modes), white for the other aptX variants, blue for SBC. The app also displays this information in real time.

Is game mode compatible with voice calls?
No. Enabling game mode (low latency) disables the bidirectional transmission required for calls and for using the headset’s microphone. To talk with teammates online, you must turn this mode off.

Can I use the QCC Dongle Pro with my MacBook without a smartphone?
Initial setup requires the mobile app to pair your headsets. Once this step is done, the transmitter can be used on a Mac in plug‑and‑play mode: it will automatically reconnect to stored devices. The macOS app is not officially supported.

My headset only supports the SBC codec. Is there any point in using the QCC Dongle Pro?
The benefit will be limited. The transmitter mainly improves listening by unlocking superior codecs like LDAC or aptX Adaptive. With an SBC‑only headset, you will gain the connection stability of Bluetooth 5.4 and MFi certification, but not a qualitative improvement in audio.

Does the QCC Dongle Pro work with AirPods?
AirPods use only AAC via Apple’s native Bluetooth and do not support aptX or LDAC codecs. The QCC Dongle Pro will therefore bring no improvement with these earphones.

What’s the difference compared to the standard (non‑Pro) QCC Dongle?
The only functional difference is the absence of LDAC on the standard model. All other codecs (aptX, aptX HD, aptX Adaptive, aptX Lossless, SBC, AAC) are identical on both versions. Owners of Sony or other LDAC‑compatible headsets will want to choose the Pro version.

Technical specifications

Bluetooth connectivity

• Bluetooth version: 5.4
• Operating frequency: 2.402 GHz to 2.480 GHz
• Technology: Qualcomm Snapdragon Sound (latest generation)

Supported audio codecs

• SBC (basic codec)
• AAC
• LC3
• aptX
• aptX HD
• aptX Adaptive
• aptX Lossless
• LDAC (up to 990 kbps)

Audio performance

• Maximum LDAC bitrate: 990 kbps (near lossless transmission)
• Resolution: 48 kHz / 24-bit (LDAC)
• Latency: ultra-low (down to 48 ms)
• High-resolution audio transmission

Features

• Ultra-low latency for gaming and video
• Precise audio-video sync
• Support for HD voice calls (with a headset equipped with a microphone)
• Full-duplex support for apps like WeChat and Zoom
• Management of multiple Bluetooth device profiles (permanent storage)
• Manual codec selection via the app
• Low-latency mode for gaming

Compatibility

• Operating systems: iOS, Android 5.1+, Windows 10 (version 1803+), macOS, Linux, HarmonyOS
• Devices: iPhone / iPad (USB-C only), smartphones, tablets, computers
• Gaming: PlayStation 5, Nintendo Switch (Lite, standard, OLED)
• Important note: not compatible with iOS devices with a Lightning port (adapters not supported)
• Tested compatible headphones: Sony WH-1000XM5 / XM6, WF-1000XM5, Technics AZ80, Audio-Technica ATH-TWX7, Bose, B&O, B&W, Sennheiser

Installation and setup

• Ready to use on Windows 10+ and macOS (no driver required)
• USB Type-C interface
• Configuration via the dedicated Questyle app
• Firmware updates available via the app

Physical and electrical characteristics

• Power consumption: 37 mA
• Battery impact: around 10% of an iPhone 16 battery after 10 hours of intensive use (LDAC)
• Weight: 57 grams
• Depth: 10 mm (8 mm USB-C metal connector + 2 mm plastic shoulder)
• Compact, portable design, optimized not to protrude excessively from the port

Certifications

• Apple MFi certification (Made for iPhone / iPad)
• Qualcomm Snapdragon Sound certification
• Sony LDAC certification (official partner)
• World’s first MFi-certified lossless Bluetooth transmitter