Questyle QCC Dongle Pro2: Incredible Sound For iOS & Android Devices

This Questyle QCC Dongle Pro2 $99 Bluetooth transmitter brings LDAC, aptX Lossless, Bluetooth 6.1, and low-latency wireless audio to your favorite devices. But does your setup actually need one?

Apple makes some pretty incredible devices, but when it comes to Bluetooth audio, the company has been a little stubborn about embracing the latest high-resolution codecs. For me this has been a bummer as I have a number of aptX as well as LDAC headphones/speakers that I want to stream with my IOS devices, but haven’t been able to.

Sure, your iPhone sounds perfectly fine through most wireless headphones, but if you’ve invested in a premium pair audiophile-grade cans or powered speakers, there’s a good chance you’re leaving some sonic performance on the table.

The Questyle QCC Dongle Pro2 is a solution I’ve been waiting for, a tiny $99 USB-C Bluetooth transmitter that brings high-resolution wireless audio to iOS and Android devices, Macs, PCs, and even gaming consoles. It’s a small and simple fix that has definitely upgraded my wireless listening experience out of my iPhone to my ecoute TH2 w/ LDAC and Bowers & Wilkins PX8 w/ aptX adaptive.

What Is the Questyle QCC Dongle Pro2?

Questyle is a Chinese audio manufacturer specializing in high-performance DACs, headphone amplifiers, and personal audio equipment. The company has built a reputation for squeezing impressive sound quality out of relatively compact devices.

The Questyle QCC Dongle Pro2 continues that tradition, although instead of amplifying your headphones, it upgrades the Bluetooth connection between your source device and compatible wireless audio gear. The big attraction is support for high-resolution Bluetooth codecs like LDAC, aptX HD, aptX Adaptive, aptX Lossless, and LHDC, technologies that can deliver more audio information than standard Bluetooth codecs.

For iPhone owners, LDAC support is particularly interesting. Apple’s native Bluetooth implementation doesn’t support Sony’s LDAC codec, which can transmit audio at up to 990kbps. The Pro2 essentially sidesteps that limitation by handling Bluetooth transmission itself.

Think of it as giving your iPhone a better set of wireless audio credentials without having to wait for Cupertino to get around to it, which the probably never will if we are being intellectually honest here.

Design & Build Quality: Small, Simple, and Mostly Invisible

The first thing you’ll notice about the Questyle QCC Dongle Pro2 is how ridiculously small it is. This is nice, but it also makes the Questyle QCC Dongle Pro2 very easy to lose. I literally keep it in the box in my headphone case, not ideal but otherwise I know it will be lost.

Tip to Questyle, maybe include a small plastic case that is neon green or brightly colored to prevent loss and will fit more easily into headphone cases

Measuring just 25.2 x 10.3 x 15.25mm and weighing 2.2 grams, it’s barely larger than the USB-C connector itself. The glossy gunmetal-gray finish gives it a slightly more premium appearance than your average plastic computer accessory, although there’s nothing particularly luxurious about the construction.

The horizontal design works nicely with smartphones and tablets, keeping everything relatively compact. However, that same width can create problems with laptops where USB ports are packed tightly together. On my iPhone the USB-C connector is deep enough to fit in with a case on it.

Questyle includes a USB-C to USB-A adapter, which helps with compatibility, although a short USB-C extension cable would have been a welcome addition along with some kind of case to keep them in.

A small LED indicates the active codec and pairing status. It’s functional, unobtrusive, and provides just visible indication so you know it’s connected properly, which is a simple yet very helpful feature.

Setup & Compatibility: Plug, Pair, Play

Getting started is refreshingly straightforward. Plug the Pro2 into your device, open the free Questyle app, and pair it with compatible Bluetooth headphones or speakers.

The app allows you to select codecs, manage connected devices, update firmware, and enable additional features like Auracast and Game Mode.

Compatibility is extensive, according to Questyle covering iOS, Android, macOS, Windows, Linux, PlayStation 5, and Nintendo Switch. However at the time of testing I could not get the device to work with my MacBook Pro M3 Pro and did not try it on anything but my iPad and iPhone 15, which worked perfectly.

One important detail: your headphones must support the codec you’re trying to use. The one standard being Bluetooth, but you are not buying this for standard BT connectivity, you are buying it for a higher bitrate codec. So make sure to double check compatibility on your devices.

Plugging the Questyle QCC Dongle Pro2 into your iPhone won’t magically turn your AirPods into LDAC headphones. Apple’s earbuds don’t support LDAC, so this product makes considerably more sense for people using compatible third-party headphones.

It’s also worth noting that many Android devices already support LDAC natively, making the Pro2 less essential unless you’re after its other features.

Sound Quality: Does LDAC Actually Make a Difference?

Here’s where things get interesting. The Questyle QCC Dongle Pro2 supports LDAC transmission rates up to 990kbps, allowing compatible headphones to receive more audio data than conventional Bluetooth connections.

That doesn’t automatically mean everything will sound dramatically better. Your headphones, source material, listening environment, and even the quality of the recording all play significant roles, especially with a headphone like the ecoute TH2 (which I listened to extensively to with this dongle).

But with a capable pair of headphones and well-produced music, higher-bitrate codecs can help preserve subtle details, spatial information, and the overall presentation of a recording. For electronic music fans, this can mean better appreciation of layered synthesizers, intricate percussion, and the atmospheric details producers spend countless hours obsessing over.

Think Jon Hopkins’ meticulously crafted soundscapes or the low-frequency architecture of a well-produced Moderat track. Those subtle textures are part of what makes great electronic music so immersive.

The Pro2 isn’t creating additional detail; it’s providing a higher-bandwidth wireless connection that can help compatible headphones reproduce more of what’s already there.

And that’s really the point. I will say this, the listening experience on the ecoute TH2 was elevated noticeably when using the Pro2.

Bluetooth 6.1, Gaming & Auracast: More Than Just Better Music

While LDAC gets most of the attention, the Pro2 has a few other tricks worth discussing.

Bluetooth 6.1 brings updated wireless capabilities, with Questyle emphasizing improved connection stability and interference resistance. That’s particularly useful in crowded environments where competing wireless signals can turn Bluetooth listening into an exercise in patience.

For gamers, the Pro2 supports low-latency audio through aptX Adaptive and LE Audio. Questyle claims latency as low as 48ms with aptX Adaptive and 20ms using compatible LE Audio Low Latency equipment.

Those numbers depend on the headphones and connection, but the potential benefits are obvious when gaming on a Nintendo Switch or PlayStation 5. Nobody wants to hear an explosion half a second after watching it happen.

The Pro2 also supports Auracast, a relatively new Bluetooth broadcasting technology that allows multiple compatible headphones or speakers to receive audio from a single source.

Imagine sharing a movie’s audio with several people wearing their own headphones without disturbing everyone else in the room. It’s still an emerging technology, but it’s one of the more interesting developments in wireless audio.

Who Should Buy the Questyle QCC Dongle Pro2?

For me it was simple, to upgrade my sound out of the iPhone due to lack of higher bitrate codecs that work with my higher end headphones and speakers. At $99, the Pro2 isn’t necessarily an impulse purchase, especially considering that many people are perfectly happy with their existing Bluetooth connections. This product has target audience, and it’s not your average wireless headphone user, it’s those wanting to push their listening experience to best possible output.

iPhone owners with premium LDAC-compatible headphones are the obvious audience. If you’ve already invested in high-quality wireless headphones, unlocking their full codec capabilities is an attractive proposition. I will vouch for this after roughly 5-6 hours of listening and comparing and contrasting the signal from standard BT to LDAC.

For travelers, remote workers, and anyone spending significant time listening through headphones, the combination of improved codec support and broad device compatibility makes the Pro2 an appealing addition to the everyday tech kit.

Just remember that better codecs don’t necessarily translate into better sound if the rest of your audio setup isn’t up to the task. This dongle doesn’t make ok headphones sound like high end HiFi by any stretch, so keep your expectations realistic.

Questyle QCC Dongle Pro2 Specifications

Final Verdict: A Small Upgrade With Some Big Potential

The Questyle QCC Dongle Pro2 is one of those accessories that won’t make much sense to everyone, but for the right person, it solves a very specific problem rather elegantly.

It gives Apple users access to high-resolution Bluetooth codecs, adds low-latency wireless audio options for gaming, and introduces emerging technologies like Auracast in a package that’s barely noticeable once plugged in.

Would I recommend it to someone listening to Spotify through a basic pair of Bluetooth earbuds? Nope, save your money. But for someone who’s invested serious money in premium wireless headphones and wants to get more out of them across multiple devices, the Pro2 is worth considering.

Sometimes the most useful upgrades aren’t the ones that require replacing your entire setup. They’re the little pieces of technology that help everything you already own work a bit better. And in this case, that little piece weighs about as much as a couple of paper clips.

Pros

• Brings LDAC and other high-resolution Bluetooth codecs to iOS devices
• Supports Bluetooth 6.1, Auracast, and LE Audio
• Low-latency options for compatible gaming headsets
• Extremely compact and lightweight
• Broad compatibility across mobile devices, computers, and gaming consoles
• Simple setup with useful app controls

Cons

• $99 is relatively expensive for a Bluetooth dongle
• Wider design can obstruct adjacent laptop ports
• Requires compatible headphones to take advantage of advanced codecs
• Less compelling for Android users with native LDAC support
• No USB-C extension cable included

Price: $99