If you want a reliable way to listen to music and charge your phone simultaneously on modern devices, choose Subynanal USB c; if you need secure, awareness-friendly audio specifically for exercise, choose Boytond Open Ear Earbuds. These two products solve completely different problems, and comparing them directly is like weighing a power adapter against a pair of running headphones. One is a physical bridge for connectivity that keeps your battery alive while you use wired gear, and the other is a wireless lifestyle tool designed to keep you safe and moving during active sessions. I have analyzed the specifications and design intent behind both to help you decide which one actually fits your daily routine, especially when you are looking for the best on ear headphones for exercise or a solution that eliminates the hassle of tangled cables while charging.
• Subynanal USB c: Its greatest strength is the ability to play high-resolution audio (up to 32-bit/384kHz) while delivering up to 60W fast charging through a single port; its trade-off is that it is a passive dongle with no battery, requires a specific cable length of 13 cm, and cannot transfer data. This pick is for travelers or commuters who refuse to carry multiple adapters and want to use their existing 3.5mm headphones without draining their phone's battery.
• Boytond Open Ear Earbuds: Its biggest advantage is the open-ear design that combines Bluetooth 5.3 stability with an impressive 50-hour total battery life including the case, plus a fast-charge feature that gives an hour of play in just five minutes; its trade-off is the lack of active noise cancellation and the fact that it relies entirely on wireless connectivity rather than a physical jack. This pick is for runners, gym-goers, and anyone who needs to stay aware of their surroundings while keeping their audio secure and sweat-free.
The Subynanal USB c adapter is a functional piece of hardware built for a very specific gap in the modern device ecosystem. As smartphones increasingly ditch the traditional 3.5mm headphone jack, many users find themselves stuck with high-quality wired headphones that suddenly don't fit their new phones. This adapter solves that friction by offering a dual-function port that handles both audio playback and power delivery. What stands out immediately in the data is the support for 60W PD 3.0 charging. This means you aren't just listening to music; you can run your device at full speed while using the audio output. For someone who uses their phone for navigation during long drives or needs to keep their screen on for work tasks while wearing headphones, this is a critical feature. You do not have to choose between staying powered up and enjoying your audio; this dongle allows you to do both at once.
The audio quality specification here is also worth noting for audiophiles who prefer wired connections. The product supports up to 32-bit and 384Khz resolution, which exceeds the standard 24-bit and 96Khz found in many budget adapters. If you are the type of person who invests in high-fidelity wired headphones and wants to ensure they get the full potential of those drivers, this adapter preserves that fidelity. It is plug-and-play, requiring no apps or drivers, which makes it incredibly simple to use in any environment. However, there is a significant limitation: it does not support data transfer. This is not a hub; it is strictly for audio and power. Furthermore, while it works with a wide range of devices including iPhone 15 and 16 series, Samsung Galaxy S20 through S24, and various Pixel models, you must be aware that it may not support Quick Charge protocols on some newer phones, making a standard PD wall charger necessary for optimal speeds.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-25 · 8 min read · Independent comparison
This product is ideal for the commuter, the road-tripper, or the student who carries heavy-duty wired headphones but owns a phone with only USB-C ports. It is also perfect for those who hate the anxiety of a dying battery while trying to enjoy a podcast or audiobook. However, you should skip this if you are looking for a wireless experience or if you need to transfer files from your computer to your phone via the adapter. The 13 cm cable length is compact and easy to carry, but it is a fixed length, so you cannot extend it for comfort. It is a utilitarian tool, not a luxury accessory, and its value lies entirely in its ability to bridge the gap between old audio gear and new charging standards without compromising your battery life.
The Boytond Open Ear Earbuds represent a shift toward safety and comfort, particularly for people who spend time outdoors or in high-movement environments. Unlike traditional in-ear buds that seal the ear canal, these utilize an open-ear design that rests on the outer ear. This design choice is not merely aesthetic; it fundamentally changes how you interact with your environment. The data indicates these earbuds are built with a lightweight clip structure that wraps gently around the ears, reducing pressure and fatigue during extended wear. For someone who wears headphones all day at work or runs for hours, this "no pressure" feel is a game changer. It eliminates the blocked feeling common with silicone tips, allowing air to circulate and preventing the soreness that often leads people to take off their audio gear prematurely.
Battery performance is where this product truly shines for active users. With a claimed average life of 50 hours when paired with the charging case, these earbuds can last for days of intermittent use without needing a wall outlet. Even more impressive is the fast-charging capability: a mere five-minute charge provides about an hour of playtime. This is a practical reality for busy schedules where you might forget to charge overnight or need a quick top-up before a sudden workout session. The integration of Bluetooth 5.3 ensures a stable connection, which is crucial when you are moving vigorously. While they do not offer active noise cancellation, the open-ear design inherently prevents isolation, which is a safety feature rather than a deficit for outdoor activities. You remain aware of traffic, voices, and ambient sounds, making them an excellent choice for the best bluetooth headphones for exercise where situational awareness is paramount.
These earbuds are best suited for runners, cyclists, gym enthusiasts, and travelers who want to stay connected without blocking out the world. They come in a Mirror Black finish and include a carrying case, suggesting durability and portability for daily commutes. The 16.3mm dynamic drivers are engineered to deliver hi-fi stereo sound with deep bass and crisp treble, proving that open-ear technology does not have to sacrifice audio richness. However, because they rely on touch controls and lack a physical button, you will need to get used to gesturing on the earpiece to manage volume or calls. They are not designed for quiet libraries or noisy factories where isolation is required; they are made for movement. If you are searching for the best noise canceling wireless earbuds for exercise, these might not fit that specific label due to their open design, but if you prioritize safety and comfort over silence, they are a superior option.
• Best for simultaneous charging and audio → Subynanal USB c (delivers 60W power while playing music).
• Best for battery endurance → Boytond Open Ear Earbuds (50 hours total playtime with case).
• Best for safety and awareness during activity → Boytond Open Ear Earbuds (open design lets you hear surroundings).
• Best for high-resolution wired audio → Subynanal USB c (supports 32-bit/384Khz audio decoding).
• Best for active lifestyles and sports → Boytond Open Ear Earbuds (secure clip fit prevents slipping during motion).
• Best for travel convenience → Boytond Open Ear Earbuds (wireless freedom vs. the need to carry a dongle and cable).
• Best for legacy headphone users → Subynanal USB c (lets you use existing 3.5mm headphones with new phones).
• Best for quick energy boosts → Boytond Open Ear Earbuds (5-minute charge yields 1 hour of use).
I would buy the Boytond Open Ear Earbuds for my personal setup, specifically because I value the freedom of wireless audio combined with the safety of being able to hear my environment. While the Subynanal USB c is a clever and necessary tool for keeping wired headphones alive, it feels like a compromise that requires managing cables and adapters. The Boytond earbuds, with their 50-hour battery life and secure, comfortable fit, solve the real-world problem of staying motivated and safe during workouts. They are the clear winner for anyone looking for the best on ear headphones for exercise, offering a seamless blend of comfort, durability, and audio clarity that a simple dongle simply cannot match.
You should check the current product details on Amazon for specific moisture protection levels before using them in heavy rain.
Yes, the adapter is compatible with most Type-C devices, including Samsung Galaxy S20 through S24, Google Pixel, and Huawei models, though it does not support data transfer.
Yes, the Boytond earbuds are designed for calls with clear audio capabilities, utilizing Bluetooth 5.3 for a stable connection, though the exact microphone sensitivity is not detailed in the specs.
Absolutely, the adapter is listed as compatible with iPhone 15, 16, and their Pro and Max variants, allowing you to use 3.5mm headphones while charging these specific models.
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