Multi-Frequency Schumann Resonance and Gamma Sound Therapy Headset

HarmoDuo is a lightweight, behind-the-ear frequency audio headset engineered to deliver structured sound programs centered around 7.83Hz Schumann resonance frequency, 40Hz Gamma tones, and precision brainwave entrainment audio patterns in a compact and comfortable form.

Designed with a full-range 20Hz–20kHz audio driver and fully separated stereo channels, HarmoDuo accurately reproduces frequency-based binaural signals across the entire audible spectrum. This allows stable low-frequency modulation while preserving high-frequency clarity and balanced stereo performance.

Unlike tabletop or narrow-band devices limited to midrange output, HarmoDuo provides full-spectrum audio reproduction, enabling precise playback of Schumann-range and Gamma-frequency audio structures with consistent channel separation and phase alignment.

Each built-in session runs in a structured 30-minute format and loops continuously until powered off, supporting uninterrupted listening tailored to your preferred sound environment.

Weighing only 70g, HarmoDuo features a zero-pressure ear-hook design that offers a soft, stable fit without pressing against the ears, while still allowing awareness of your surroundings. The flexible rear support band ensures comfort during extended listening sessions without creating isolation fatigue.

With up to 8–10 hours of playback per charge, USB-C fast charging, and wireless smartphone connectivity, HarmoDuo integrates seamlessly into home, work, relaxation, travel, and focused listening routines.

Built-in Frequency Programs

• 7.83Hz Schumann-range binaural tones
• 40Hz Gamma pure tones: MIT original and soft version
• Gamma ambient soundscapes (Mountain / Ocean / Dream)

Technical Specifications

Frequency Response: 20Hz–20kHz
Audio Structure: Binaural stereo signal delivery
Playback Format: 30-minute structured loops
Controls: Volume + / Volume – / Power & Mode Switch
Battery Life: Up to 8–10 hours
Charging Port: USB-C
Weight: 70g
Connectivity: Wireless smartphone connection supported