Experience true audio freedom in and out of the water with the Sanag B33S Bone Conduction Bluetooth Earphones. Featuring an innovative open-ear design and a robust IPX8 waterproof rating, these ultra-lightweight 21g headphones are perfectly engineered for swimming, running, and intense sports. Equipped with advanced Bluetooth 5.3, a built-in 32GB memory for phone-free MP3 playback, and support for smart voice assistants, they deliver versatile, high-fidelity sound for up to 8 hours on a single charge.
- Advanced bone conduction technology provides a safe, open-ear listening experience.
- IPX8 waterproof rating allows for fully submersible use during swimming and water sports.
- Built-in 32GB memory stores your favorite songs for independent, phone-free MP3 playback.
- Provides up to 8 hours of continuous battery life powered by a 150mAh capacity battery.
- Bone Conduction Audio: Utilizes a premium bone conduction vocalism principle to deliver rich, clear sound directly through your cheekbones, leaving your ear canal completely open to hear your surroundings.
- IPX8 Swimming Ready: Built to withstand the elements, these earbuds boast an IPX8 waterproof certification, making them fully capable of submerged use while swimming or enduring heavy sweat and rain.
- 32GB Built-in Storage: Leave your smartphone securely in your locker; the integrated 32GB memory allows you to store and natively play a massive library of MP3 files directly from the wireless headset.
- Stable Bluetooth 5.3: Features the latest Bluetooth 5.3 technology, ensuring a fast, ultra-stable wireless connection with an impressive maximum range of 10m to 20m for uninterrupted streaming.
- Smart Voice Integration: Includes a high-quality built-in microphone and seamless compatibility with both Apple Siri and Google Assistant for effortless, hands-free voice control while on the move.
- Universally compatible with Bluetooth-enabled smartphones and devices, operating seamlessly alongside the dedicated Support APP for personalized audio tuning.
- Ideal for a vast array of activities, explicitly designed for swimming, outdoor sports, powersports, hunting, video games, and high-fidelity office listening.
- Perfect for users who require situational awareness for safety, as the “Sound Isolating: No” design keeps you connected to your environment while cycling or running.
- Music Transfer: Connect the headset to your computer using the provided USB cable to easily drag and drop your favorite audio files directly into the 32GB onboard memory.
- Bluetooth Pairing: Power the device on and select the Sanag B33S from your phone’s Bluetooth menu to establish a secure V5.3 wireless connection.
- Proper Charging: Use the included charging cable to replenish the 150mAh battery. Always ensure the charging contacts are completely dry after swimming before connecting to power to prevent short circuits.
Product Specifications
| Brand Name / Style | Sanag / Bone conduction headphones |
| Vocalism Principle | Bone Conduction |
| Bluetooth Version / Range | 5.3 / 10m-20m |
| Memory Capacity | 32GB |
| Battery Capacity / Life | 150mAh / Up to 8 hours |
| Waterproof Rating | Yes (IPX8 for Swimming) |
| Microphone / Voice Assistants | Yes / Apple Siri & Google Assistant Support |
| Active Noise-Cancellation | No |
| Codecs / Frequency Response | AAC, sbc / 20 – 20000Hz |
| Material / Headphone Pads | Plastic / Silicone |
| Weight | 21g |
| Certifications | CE, FCC, RoHS, weee |
Packing List
- 1 x Sanag B33S Bone Conduction Bluetooth Earphones (Blue)
- 1 x Charging Cable
- 1 x User Manual
Warnings & Safety Notes
- Underwater Connectivity: Bluetooth signals generally do not transmit effectively underwater. For uninterrupted audio while swimming, it is highly recommended to use the internal 32GB MP3 memory playback mode rather than relying on a wireless connection to your phone.
- Situational Awareness: Because these headphones utilize an open-ear bone conduction design with strictly no Active Noise-Cancellation and no sound isolation, they will not block loud ambient environmental noises.
- Charging Safety: Although the device boasts an impressive IPX8 waterproof rating, strictly ensure that the USB charging port is completely free of moisture and debris before plugging in the cable to prevent internal electrical damage.

