If you want to listen to music and charge your phone simultaneously on a long flight without carrying extra bricks, choose Subynanal USB c; if you need a durable, magnetic replacement cable specifically for swimming headphones like the MARLALL S800 or LOBKIN X7, choose WUNIAK Charging Cable.
• Subynanal USB c: Its biggest strength is combining high-speed 60W PD charging with lossless audio output in a single compact dongle, but it does not support data transfer. This pick is for travelers and commuters who refuse to compromise on battery life or sound quality while using their phone.
• WUNIAK Charging Cable: Its biggest strength is its specialized magnetic design and voltage regulation tailored for underwater swimming headphones, but it only works with specific swim headphone models. This pick is for swimmers and athletes who have lost their original charger or need a secure, tangle-free backup.
• The Verdict: Choose Subynanal for general daily smartphone use and travel convenience; choose WUNIAK strictly for maintaining your swimming audio gear.
This adapter is built for the modern traveler who lives by their device's battery life. The core appeal here is the 2-in-1 functionality that merges a USB Type C power delivery port with a standard 3.5mm auxiliary jack. In practical terms, this means you can plug your wired headphones directly into your phone and keep it powered up at the same time. For someone spending six hours on a plane trying to watch movies or listen to podcasts, the ability to maintain volume control while the battery drains slowly is a game-changer. The design prioritizes portability, measuring just 13 cm in length, which makes it easy to toss into a pocket or bag alongside other essentials.
The audio capabilities are another major selling point for audiophiles who still rely on wired connections. While many budget adapters limit output to 24-bit/96kHz, this unit supports up to 32-bit and 384kHz resolution. This specification suggests a much higher fidelity experience, ensuring that the music sounds crisp and detailed rather than muffled or compressed. Combined with the fast charging capability of up to 60W Power Delivery (PD), it handles heavy usage scenarios well. You aren't just getting a pass-through connection; you are getting a dedicated digital-to-analog conversion path that respects the quality of your source material.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-26 · 7 min read · Independent comparison
However, this product is not for everyone. It explicitly does not support data transfer, meaning you cannot use it to sync files or connect to a computer for data purposes. It is purely an audio and power conduit. Additionally, while it boasts broad compatibility with devices ranging from iPhone 17 and 16 series to Samsung Galaxy S24 and Google Pixel lines, users should be aware that it may not support Quick Charge protocols on every new phone model, so a standard PD wall charger is recommended for optimal speed. If you don't have a 3.5mm headphone jack on your device and rely on Bluetooth, this adapter might feel redundant unless you prefer the reliability of a wired connection during flights where Bluetooth interference can sometimes be an issue.
The WUNIAK Charging Cable serves a very niche but critical market: swimmers. Unlike the universal adapter above, this is a specialized accessory designed exclusively as a replacement for the MARLALL S800 and LOBKIN X7 swimming headphones. Its primary function is to restore functionality to these specific pieces of gear when the original charger is lost, damaged, or simply unavailable. The cable features a magnetic connector, which is essential for underwater environments where water resistance and quick, one-handed attachment are necessary. A 60cm length provides enough flexibility to reach a charging station while keeping the cable manageable inside a gym bag or locker.
Durability and safety are the defining characteristics of this cable. It is constructed with copper wire and includes a Voltage Regulator (PTC) circuit inside. This internal component is crucial because it prevents overcurrent situations that could damage the sensitive electronics of your swimming headphones. Swimming headphones operate under unique stress conditions—constant exposure to moisture and movement—and a simple copper wire isn't enough to guarantee longevity. The PTC protection ensures that the charging process remains stable and efficient, whether you are plugging it into a PC, a laptop, or a wall mount. This focus on circuit safety speaks to a design philosophy that prioritizes the lifespan of the expensive device it charges.
It is important to understand that this cable has no utility outside of its intended ecosystem. It will not charge your phone, tablet, or any other standard USB-C device. It is a male-to-male connector with four pins, engineered specifically to interface with the proprietary ports of the LOBKIN X7 and MARLALL S800 units. If you are looking for a foldable kids headset for airplane travel or transparency mode open ear headphones for airplane use, this cable is irrelevant to those needs. It is strictly a maintenance tool for aquatic audio equipment. However, for the owner of these specific headphones, having a reliable, compact backup cable that fits easily into a small compartment is invaluable. The "2 Pack" nature of the listing suggests that having a spare in the car or at the pool deck is part of the value proposition, ensuring you never miss a workout due to a dead battery.
• Best for battery life on long trips → Subynanal USB c, thanks to its 60W PD fast charging while you listen.
• Best for swimming enthusiasts → WUNIAK Charging Cable, as it is the only one compatible with underwater headphone systems.
• Best for audio fidelity → Subynanal USB c, supporting 32-bit/384kHz output versus a basic charging-only function.
• Best for portability → Both are compact, but Subynanal's 13cm length makes it easier to carry in a tight pocket compared to the 60cm cable.
• Best for versatility → Subynanal USB c, working with iPhones, Samsungs, iPads, and MacBooks, whereas WUNIAK is locked to two specific brands.
• Best for safety protection → WUNIAK Charging Cable, featuring built-in PTC voltage regulation to protect delicate swim gear.
• Best for noise isolation → Subynanal USB c enables the use of high-quality wired headphones, ideal for blocking out engine noise on a plane.
• Best for tangle-free storage → WUNIAK Charging Cable, with its magnetic connector and shorter effective length for gym bags.
In my opinion, if I were packing for a trip, I would buy the Subynanal USB c. The ability to charge my phone while listening to music through wired headphones solves the most common frustration of air travel: the fear of a dead battery ruining the entertainment. It transforms a standard phone into a self-sufficient media center. On the other hand, if I owned the MARLALL S800 headphones, I would immediately grab the WUNIAK Charging Cable to ensure I had a backup for my swim sessions. These are two completely different tools for two different problems. For the average user looking for the best foldable gaming headset for airplane experiences or general connectivity, the Subynanal adapter offers far more value because it enhances the daily usability of the device itself.
No, this adapter is designed strictly for audio playback and power delivery; it does not support data transfer functions between the phone and a computer.
While the cable is made for swimming headphones, the product description focuses on the magnetic connector and copper construction for indoor and outdoor use, emphasizing durability and circuit protection rather than full submersion specifications for the cable itself.
It is compatible with most USB-C devices including Samsung Galaxy, Google Pixel, and Huawei models, though some newer phones may require a PD wall charger to achieve the fastest speeds and may not support QC protocols.
You only need the WUNIAK cable if you own the MARLALL S800 or LOBKIN X7 swimming headphones; it is a specialized replacement with a magnetic connector that standard chargers do not have.
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