If you want a reliable, compact transmitter to wirelessly stream audio from older 3.5mm sources like airplane seatbacks or gym equipment to your existing wireless headphones, choose Twelve South AirFly SE; if you need a standalone pair of earbuds with real-time AI translation and built-in noise cancellation for travel or business communication, choose Rulbovs NE72. These two devices solve completely different problems in the audio ecosystem, and confusing them is a common mistake that leads to buyer's remorse. One is an accessory designed to extend the life of your current gear, while the other is a comprehensive tool that replaces your headphones entirely.
• Twelve South AirFly SE: Its biggest strength is its ability to instantly convert any analog 3.5mm jack into a Bluetooth source with over 20 hours of battery life, but it trades off by being just a dongle that requires you to already own compatible Bluetooth headphones. This pick is for travelers and commuters who refuse to deal with tangled cords on flights or at the gym.
• Rulbovs NE72: Its biggest strength is its all-in-one functionality as a translator earbud with active noise cancellation and a massive 40-hour total battery life, but it trades off by being a larger, in-ear device that relies heavily on a smartphone app for its core features. This pick is for international travelers, business professionals, and anyone looking for the best bone conduction headphones for music production scenarios where isolation and translation are key.
• The Decision: Choose the AirFly SE if you have high-end wireless headphones you love and just need to use them on non-Bluetooth devices. Choose the NE72 if you need a new pair of earbuds that can speak multiple languages and block out the world.
The Twelve South AirFly SE is not a headphone; it is a bridge. It is a small, white plastic transmitter designed to plug directly into the 3.5mm auxiliary jack of almost any audio source. If you have ever sat on an airplane and been forced to use wired earbuds because the seatback entertainment system only has an analog output, this device solves that problem immediately. It takes that analog signal and converts it into a Bluetooth 5.2 stream that connects to your preferred wireless headphones. Whether you use Sony, Bose, Beats, or Samsung Galaxy Buds, the AirFly SE treats them all the same way, allowing you to keep using the headphones you already own rather than buying a new set just for travel.
The design philosophy here is pure utility and portability. At less than 14 grams, it is nearly weightless and fits easily into a pocket or a small travel pouch. The dimensions are minimal, measuring roughly 0.38 inches in length, making it unobtrusive compared to bulkier adapters. It supports standard aptX and SBC codecs, ensuring that the audio quality remains consistent with what your headphones are capable of delivering. You do not need to download an app or pair it through a complex menu; you simply plug it in, press the button until the light flashes, and your headphones connect within seconds. Once paired, it remembers your device and reconnects automatically every time you turn it on.
This product is ideal for the frequent flyer, the commuter, or the fitness enthusiast. Gym equipment often uses proprietary 3.5mm jacks that are incompatible with modern wireless tech, leaving users stuck with annoying wires. The AirFly SE eliminates that friction. It also works with Nintendo Switch consoles and older car stereos, extending the life of devices that might otherwise feel obsolete. However, it is not for everyone. If you do not already own a pair of Bluetooth headphones, this device will not work for you. It does not produce sound on its own; it is purely a pass-through adapter. Furthermore, while it supports hearing aids that use standard Bluetooth, it is not compatible with hearing aids that rely on Bluetooth Low Energy (BLE) or require a dedicated app for pairing, so users with specialized medical audio needs must verify compatibility beforehand.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-31 · 8 min read · Independent comparison
The Rulbovs NE72 represents a shift toward intelligent, self-contained audio solutions. Unlike the AirFly SE, which is an accessory, the NE72 is a complete package of earbuds, a charging case, and powerful software integration. Its primary selling point is real-time AI translation, supporting up to 165 languages with offline capabilities for eight major ones. This makes it an essential tool for the modern global citizen. You can travel to a foreign country without Wi-Fi or cellular data, download the necessary language packs via the free Saymi app, and still communicate effectively. The device handles both incoming and outgoing speech, converting spoken words instantly so you can converse naturally without fumbling with a phone screen.
Audio performance is another critical area where the NE72 distinguishes itself. Equipped with 13mm Hi-Fi dynamic drivers, these earbuds deliver deep bass and crisp treble, making them suitable for listening to music as well as conducting business. The inclusion of ENC noise cancellation technology filters out approximately 90% of background noise, which is vital for maintaining focus in noisy environments like airports, busy cafes, or construction sites. For those seeking the best headset for music production or detailed listening in chaotic settings, the combination of driver size and noise filtering offers a compelling experience. The touch controls allow for easy volume adjustment and mode switching, while the LED screen on the earbuds provides visual feedback on battery status and connection.
Battery life is where the NE72 truly shines for long-duration users. It offers six hours of continuous playback or translation on a single charge, and the portable charging case adds four more full charges, totaling over 40 hours of usage. This is a significant advantage over many competitors that struggle to reach even half that mark. The case itself charges fully in just 1.5 hours via USB-C, ensuring you spend less time tethered to a wall outlet. The "Find My Earbuds" feature, accessible through the app, allows you to locate lost units by triggering a sound or vibration, adding a layer of security for expensive gear. However, the reliance on the smartphone app for translation and tracking means that if you lose your phone, you lose access to the core functionality. Additionally, the in-ear design may not be comfortable for everyone, especially during extended wear sessions compared to open-back options.
• Best for existing wireless headphone owners → Twelve South AirFly SE: If you already own high-quality Bluetooth headphones and just need to use them on analog devices, this is the only logical choice.
• Best for international travel and language barriers → Rulbovs NE72: The built-in AI translation and offline modes make this the superior option for navigating foreign countries without internet access.
• Best battery longevity → Rulbovs NE72: With a total of 40+ hours including the case versus the AirFly SE's 20+ hours per charge, the NE72 wins for multi-day trips.
• Best for noise isolation → Rulbovs NE72: The active noise cancellation and enclosed in-ear design provide significantly better background noise reduction than the passive setup of the AirFly SE.
• Best for simplicity and portability → Twelve South AirFly SE: Its tiny, lightweight form factor makes it easier to carry in a pocket or bag compared to the bulkier earbuds and charging case of the NE72.
• Best for gym equipment compatibility → Twelve South AirFly SE: Most gym machines use 3.5mm jacks, making the AirFly SE the perfect companion for untethered workouts.
• Best for all-in-one functionality → Rulbovs NE72: It combines music, calls, and translation into one device, whereas the AirFly SE requires a separate pair of headphones to function.
• Best for low-latency video sync → Rulbovs NE72: The upgraded Bluetooth technology specifically mentions optimized audio-visual synchronization for media consumption.
In my opinion, the choice between these two depends entirely on your starting point. If you are a music producer or someone who values high-fidelity audio and already owns a great pair of wireless headphones, I would buy the Twelve South AirFly SE. It preserves your investment and solves the specific pain point of connecting to legacy hardware without compromising the sound quality you already enjoy. However, if you are looking for the best over ear headphones for music production scenarios where isolation and translation are required, or if you need a device that can handle both audio and communication in a foreign language, the Rulbovs NE72 is the clear winner. It offers a level of versatility that an adapter simply cannot match. For most people traveling internationally or needing advanced features in a single package, the NE72 is the more transformative purchase.
Yes, the AirFly SE connects to any Bluetooth device, regardless of whether it is an iPhone, Android phone, or tablet, as long as the device supports standard Bluetooth pairing.
No, the Saymi app required for translation is free to download and use with no monthly fees or hidden subscription costs for the core translation features.
Absolutely. The AirFly SE can be used while plugged into a power source via its included USB-C cable, ensuring uninterrupted audio even if the battery runs low during long flights.
While the NE72 features ENC technology that filters out up to 90% of background noise, it is primarily designed for voice clarity and general immersion rather than the deep silence found in premium over-ear ANC headphones.
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