Califone International E2 Earbud 3.5 mm 3.90 ft
- Earbud
- Black
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Brainwavz
Open-ear bone conduction headset with Bluetooth 5.4, 16 mm drivers, 10-hour battery and IPX5 water resistance for running and cycling
This bone conduction headset rests on the cheekbones instead of inside the ears, leaving the ear canal open to ambient sound. The design targets runners, cyclists and outdoor athletes who need situational awareness while listening to audio. A wraparound titanium frame flexes without permanent deformation to stay secure during vigorous movement. Bluetooth 5.4 handles the wireless link to a phone or watch.
The open-ear format replaces traditional in-ear buds that block environmental noise and can cause fatigue on long sessions. The jump is worth it when you must hear traffic, teammates or race instructions while still taking calls via the built-in microphone. Sixteen-millimetre drivers deliver stereo output for music and voice. IPX5-rated construction resists sweat and rain during exercise.
A single charge provides up to 10 hours of continuous playback, covering extended training sessions or multi-event race days. The titanium frame maintains its grip without loosening as body heat and perspiration accumulate. Bluetooth 5.4 maintains a stable connection through repeated body-shadowing cycles typical of running and cycling motion. Microphone clarity remains consistent for mid-session calls.
| Type | Headphone Extension Cords |
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The flexible titanium frame wraps around the back of the head and rests on the cheekbones, staying secure during running or cycling without clamping the ears.
Hold the multifunction button until the LED flashes red and blue, then select the headset from your phone's Bluetooth menu; the common mistake is releasing the button too early.
Rinse the frame and transducers with fresh water, shake off excess moisture, and air-dry fully before charging; avoid soaking or using high-pressure jets.
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