If you want a reliable dongle to listen to movies on your phone while keeping the battery topped up, choose Subynanal USB c; if you need a backup charging solution for your smartwatch or bone conduction headphones during a long movie marathon, choose Vtyzcm 2-Pack. These two products serve completely different corners of the tech ecosystem, yet both aim to solve a specific frustration: one handles audio and power simultaneously on a smartphone, while the other ensures your wearable gadgets never die in the middle of a scene. I have looked at the specifications for both, and the distinction is stark enough that there is no real overlap in who should buy which item. The Subynanal adapter is an essential accessory for anyone using a modern Android phone or the latest iPhone models who refuses to be tethered by a single port, whereas the Vtyzcm cables are purely about convenience and redundancy for wearables.
• Subynanal USB c: Its biggest strength is the ability to charge your device at up to 60W PD while listening to high-fidelity audio through a 3.5mm jack without draining your battery; the trade-off is that it cannot transfer data and requires a compatible wall charger for optimal speed.
• Vtyzcm 2-Pack: Its biggest strength is the dual-pack value and robust magnetic connection that prevents accidental disconnection for watches and glasses, offering fast charging in roughly two hours with built-in safety protections against over-voltage; the trade-off is its strict compatibility requirements regarding pin pitch spacing.
• Who each pick is for: The Subynanal unit is for the heavy media consumer who needs their phone to stay alive during long sessions, while the Vtyzcm pair is for the gadget owner who wants peace of mind with a spare charger for their fitness tracker or smart eyewear.
The Subynanal USB c to 3.5mm adapter is designed for a very specific workflow: consuming media without interruption. If you are settling in to watch a movie on your phone, whether it is a blockbuster on a streaming service or a downloaded file, this adapter solves the most common annoyance of modern smartphones—the lack of a headphone jack. You can plug in your wired headphones and still charge your device at the same time. This is not just a convenience; it is a necessity for anyone who listens to audiobooks or movies for extended periods and worries about their battery dying halfway through. The product supports up to 60W Power Delivery (PD) 3.0 charging, which means it can handle fast charging speeds from compatible wall adapters, ensuring your screen stays bright and your audio keeps playing.
This adapter also caters to those who care about audio fidelity. It supports high-resolution audio playback up to 32-bit and 384Khz, which is significantly higher than the standard 24-bit and 96Khz found in many cheaper alternatives. While you might not hear every nuance of this difference depending on your headphones, it indicates a more robust digital-to-analog conversion process inside the dongle. It is plug-and-play, meaning you do not need to install drivers or download apps to get sound working. This simplicity is crucial when you just want to focus on the story unfolding on your screen rather than troubleshooting connectivity issues.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-28 · 7 min read · Independent comparison
However, you must know what this device does not do before buying. It explicitly does not support data transfer; the USB-C port is dedicated solely to power delivery and audio output. If you were hoping to connect a hard drive or transfer files through this cable, this is not the tool for the job. Additionally, while it supports volume control on the headset line, it excludes Apple headsets from this specific feature set, likely due to proprietary protocols. It is also worth noting that while it supports fast charging, it may not work with Quick Charge (QC) protocols on some newer phones, so using a standard PD wall charger is recommended to get the best performance. It is a compact, 13 cm white cable that fits easily in a pocket, making it ideal for travel, but it is strictly an audio and charging bridge, not a multi-function hub.
The Vtyzcm 2-Pack Universal Magnetic Charger Cable serves a completely different audience: owners of smartwatches, fitness trackers, bone conduction headphones, and smart glasses. The primary value proposition here is reliability and redundancy. Losing the original charger for a $300 smartwatch is a panic-inducing experience, especially if you are out of the house or traveling. Having two of these cables means you can keep one at home, one at the office, or one in your travel bag. The design relies on strong neodymium magnets that snap into place automatically, aligning the four pins with precision. This auto-lock mechanism is critical because it prevents the cable from slipping off your device while you are moving around, sweating, or simply bumping your wrist.
When it comes to performance, this charger is built to deliver power efficiently without generating excessive heat. The internal construction uses a pure copper core, which offers superior conductivity compared to cheaper aluminum or mixed-metal alternatives. This allows the device to reach a full charge in approximately two hours, which is a reasonable timeframe for most daily charging cycles. The product includes advanced IC smart control technology that acts as a safety guard. It monitors the flow of electricity to prevent over-voltage, over-current, and short-circuit risks. This protection is vital for preserving the health of your wearable's battery over the long term, ensuring that a third-party charger does not degrade your expensive device.
Durability is another key factor where this 2-pack shines. The cables are encased in premium ABS housing and flexible PVC, tested to withstand over 5,000 bends. This level of durability suggests they will survive being tossed into a bag repeatedly without fraying or breaking at the connector points. However, compatibility is the main hurdle you must clear. These chargers are designed specifically for devices with a 4-pin layout and a pin-pitch spacing between 7.5mm and 8mm (specifically 7.62mm). If your smartwatch or glasses has a different contact spacing, this cable will not fit. It is a universal charger within that specific niche, but "universal" does not mean it works with every magnetic charger on the market. It is an excellent choice for someone who owns multiple compatible devices or wants a guaranteed backup that won't fail due to weak magnets or poor build quality.
• Best for uninterrupted movie watching → Subynanal USB c, as it lets you charge and listen simultaneously on your phone.
• Best for wearable redundancy → Vtyzcm 2-Pack, providing two backups for your smartwatch or fitness band.
• Best for high-resolution audio → Subynanal USB c, supporting up to 32-bit/384Khz for clearer sound through wired headphones.
• Best for safety and device protection → Vtyzcm 2-Pack, featuring built-in IC controls to guard against electrical surges.
• Best for portability → Both are portable, but Subynanal is smaller (13 cm) for a pocket, while Vtyzcm is tangle-free for a bag.
• Best for charging speed → Subynanal USB c for fast 60W PD charging of phones, versus Vtyzcm's optimized ~2-hour charge for wearables.
• Best for ease of use → Subynanal requires no drivers, while Vtyzcm requires measuring pin spacing to ensure fit.
• Best for durability → Vtyzcm 2-Pack offers a 5,000+ bend rating and robust magnetic locking, whereas Subynanal is a simple passive adapter.
I would recommend the Subynanal USB c if your primary goal is to enjoy movies comfortably on your smartphone without constantly hunting for a power outlet. The ability to listen to audio and charge at 60W simultaneously is a game-changer for media consumption, and the high-resolution audio support adds a layer of quality that cheap dongles often lack. It is the right tool for the job when you are sitting down to watch a film and need your phone to last until the credits roll. On the other hand, I would choose the Vtyzcm 2-Pack only if you already own a compatible smartwatch or bone conduction headphones and need a reliable spare charger that won't slip off your wrist. For general movie viewing, the Subynanal adapter is the more impactful purchase because it directly enhances the core experience of watching content on your mobile device.
No, the Subynanal USB c adapter is designed strictly for audio playback and power delivery; it does not support data transfer functionality.
It only works with devices that have a 4-pin magnetic connector with a pin-pitch spacing between 7.5mm and 8mm (7.62mm), so you must measure your contacts first.
It is compatible with iPhone 15, 16, and 17 series models, but note that volume control features may not work with Apple-branded headphones.
Yes, it includes built-in smart protection systems to guard against over-voltage and over-current, making it safe for continuous charging cycles.
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