Sanag Bone Conduction Headphones B33S — IPX8 Waterproof 32GB

The Sanag B33S are open-ear bone conduction headphones with IPX8 waterproofing, Bluetooth 6.0 and a built-in 32GB MP3 player that give you music and calls while keeping your ears free and your surroundings audible.

If you need headphones that work in and out of water, stay secure during exercise, and let you switch between streaming and an onboard music library, the Sanag B33S targets all three. These lightweight bone conduction earbuds sit on your cheekbones rather than in your ear canal, combining an IPX8-rated sealed design for swimming with Bluetooth 6.0 connectivity, a 32GB internal MP3 store, and up to 40 total hours of playtime with the included charging case.

How do these headphones perform while swimming and in wet conditions?

The B33S carry an IPX8 rating, meaning they are built to withstand full submersion and continuous use in water up to specified depths. The one-piece, hole-free housing prevents water ingress and the enclosed sound cavity reduces leakage so your audio stays focused even during laps.

• IPX8 professional waterproofing for full submersion up to 2 meters
• One-piece sealed construction resists water, sweat, and sand
• MP3 mode available for use underwater (Bluetooth will not transmit underwater)
• Suitable for pool training, open-water swims, and water sports

What advantages does bone conduction give for outdoor sports?

Bone conduction transmits sound through vibration on the cheekbones, keeping ear canals open so you remain aware of ambient sound—useful for running, cycling, and other outdoor activities. The B33S also enhance low-frequency response with a magnetic drive oscillator to preserve fuller audio detail despite the open-ear format.

• Open-ear design maintains situational awareness for safety
• Enhanced low-frequency vibration for fuller perceived bass
• Lightweight 4.5 g per side and ergonomic earwing wrap for stability
• Works comfortably with glasses and helmets

How reliable are calls, connectivity, and battery life?

Call quality is improved by an ENC-enabled HD microphone that reduces environmental noise, while Bluetooth 6.0 provides fast pairing and a stable link up to about 50 ft in clear conditions. Battery life covers long training sessions: each earbud runs roughly 8 hours per charge, and the charging case adds about 32 more hours for a combined 40 hours of playtime.

• ENC noise reduction for clearer voice pickup in noisy environments
• Bluetooth 6.0 for quick pairing (claimed within 3 seconds) and stable range
• 32GB built-in MP3 memory holds thousands of tracks for phone-free use
• 8 hours per charge, 40 hours total with charging case, and long standby

How do I use the MP3 mode and switch between phone and onboard music?

The B33S let you switch between Bluetooth streaming and the internal MP3 player so you can leave your phone behind when you swim or want a lighter load. For underwater sessions always use the MP3 mode because Bluetooth signals do not travel through water.

• Toggle between Bluetooth and MP3 using onboard controls
• Load music to 32GB internal storage via USB connection to a computer
• Use MP3 mode for swimming and Bluetooth for outdoor or gym use
• Controls manage playback, calls, and pairing without needing a phone

Who is this for? The Sanag B33S suit swimmers, triathletes, and active outdoor users who want continuous audio and call capability without obstructing their ears. They are a good match for people who wear glasses, need situational awareness while training, or prefer the convenience of built-in music storage alongside modern Bluetooth connectivity and long battery life.