If you want a dedicated, rugged tool for serious underwater training and marathon swimming sessions, choose MARLALL Swimming Headphones-Bone Conduction; if you need the latest connectivity standards, superior battery life, and a more versatile setup for both land and water streaming, choose RTAPL Bone Conduction.
• MARLALL: Its biggest strength is the specialized IP68 waterproofing combined with 32GB of internal storage specifically optimized for MP3 playback underwater, though its trade-off is that Bluetooth does not function while submerged.
• RTAPL: It wins on connectivity with Bluetooth 6.0 and dual-mode support, offering 15 hours of battery life and ENC noise cancellation, but it lacks the specific "MP3-only" underwater optimization found in the MARLALL design.
• Who each pick is for: MARLALL is for the swimmer who treats the pool like a gym and needs reliability without phone tethering; RTAPL is for the athlete who splits time between running, cycling, and swimming and demands seamless switching between devices.
The MARLALL S800 model is built with a singular, intense focus: keeping you safe and connected while you are in the water. This isn't just about durability; it is about functionality. The unit features 32GB of built-in memory, which allows you to store up to 8,000 songs directly on the device. This is critical because, as the specifications note, Bluetooth signals cannot transmit underwater. By switching to MP3 mode, you bypass the need for a phone entirely, ensuring your music plays regardless of depth or pressure.
For the serious swimmer, the comfort factor is equally vital. Weighing in at roughly 22.68 grams, this bone conduction headphone uses premium liquid silicone material to create a seal that conforms to the ear without causing pressure points. This lightweight design means you can wear them for long durations during practice sets or open-water swims without the fatigue that often comes with bulkier headphones. The magnetic charging cable also simplifies maintenance, allowing easy access to the internal storage via a computer to update playlists before hitting the pool.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-31 · 6 min read · Independent comparison
However, this product has a clear boundary. If your primary use case involves using these headphones for streaming audio from a smartphone while you are actually underwater, they will not work. The MARLALL requires you to switch modes. If you are looking for a device that seamlessly switches between Bluetooth and underwater play without manual intervention, this might feel restrictive. But if you prioritize a secure, slip-free fit that survives the harshest aquatic environments and offers a dedicated offline library, this is the tool you need. It is for the athlete who wants zero distractions and maximum safety while snorkeling, diving, or doing laps.
The RTAPL NOS10W takes a different approach by prioritizing versatility and modern connectivity over niche underwater specialization. The standout feature here is the inclusion of Bluetooth 6.0, which represents a significant leap forward in transmission stability compared to older generations. This newer standard supports seamless switching between two connected devices simultaneously, making it ideal for someone who might be listening to a podcast on their phone while monitoring notifications on a tablet. Furthermore, the 220mAh battery provides up to 15 hours of continuous playback, a figure that suggests it can easily handle multi-day training blocks or ultra-endurance events without needing a recharge.
Where the MARLALL focuses purely on the water, the RTAPL aims to be the all-around sports companion. It features four distinct EQ modes—Bass, Balanced, Vocal, and Swimming—which allow users to tailor the sound profile to their current activity. Whether you are pounding out a run on pavement or doing laps in a pool, you can adjust the audio output with a single click. The inclusion of ENC (Environmental Noise Cancellation) technology, claiming 85% ambient noise reduction, is another major plus for runners and cyclists who need to filter out wind and crowd chatter to hear their music clearly.
This unit also boasts a patented ergonomic fit with liquid silicone ear hooks and a neckband design that weighs only 26 grams. While still incredibly light, the 26g weight includes a slightly different construction than the MARLALL, focusing on a snug fit that prevents slipping during high-intensity movement. The 32GB storage is present here as well, offering the same capacity for offline tracks, but the real draw is the dual-mode capability. You can stream via Bluetooth indoors or outdoors, then switch to MP3 mode when you hit the water. It is for the athlete who refuses to compromise on battery life or connectivity speed and wants one pair of headphones that handles everything from the gym floor to the ocean depths.
• Best for pure underwater reliability → MARLALL Swimming Headphones-Bone Conduction, due to its specific MP3 mode optimization and robust IP68 sealing designed for immersion.
• Best for battery endurance → RTAPL Bone Conduction, with a 15-hour lifespan that covers longer training sessions than typical competitors.
• Best for connectivity tech → RTAPL Bone Conduction, leveraging Bluetooth 6.0 for faster pairing and stable transmission up to 33 feet.
• Best for multipoint usage → RTAPL Bone Conduction, which explicitly supports connecting to two devices at once for seamless switching.
• Best for lightweight comfort → MARLALL Swimming Headphones-Bone Conduction, weighing in at just 22.68g with a minimalist design that eliminates pressure points.
• Best for audio customization → RTAPL Bone Conduction, offering four distinct EQ modes to adapt sound quality to Bass, Balanced, Vocal, or Swimming scenarios.
• Best for call clarity → Both offer solutions, but RTAPL includes active ENC noise cancellation to isolate voice during calls, whereas MARLALL advises drying the mic post-swim.
• Best for streaming versatility → RTAPL Bone Conduction, as it balances high-resolution transducers with the ability to stream wirelessly in almost any environment.
In my opinion, I would buy the RTAPL Bone Conduction for my daily routine. While the MARLALL is a marvel of engineering for specific underwater tasks, the RTAPL offers a more complete package for the modern athlete who values the best low latency wireless earbuds for streaming across various activities. The jump to Bluetooth 6.0 and the 15-hour battery life make it far more practical for mixed workouts where you might run, cycle, and swim in the same session. I recommend the RTAPL because it removes the friction of constantly managing device connections and ensures you have enough power to last through your longest days without worrying about charging. It strikes the perfect balance between performance, comfort, and connectivity.
The RTAPL model explicitly supports connecting to two devices simultaneously, making it a strong candidate for users who need to switch between a phone and a tablet without re-pairing. The MARLALL does not mention this dual-device capability in its specifications.
The RTAPL lists an ENC noise cancellation feature designed to reduce ambient wind and crowd noise during calls. The MARLALL mentions drying the microphone after swimming to prevent issues but does not list active noise cancellation technology for call quality.
Yes, both units feature 32GB of internal storage to hold up to 8,000 songs, allowing you to listen via MP3 mode even when Bluetooth signals cannot reach you underwater.
The MARLALL model includes a 1-year warranty description, while the RTAPL model specifies a 2-year manufacturer warranty, suggesting potentially longer coverage for the latter.
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