{"product_id":"40hz-gamma-sound-therapy-brainwaves-entrainment-audio-device-headset","title":"7.83Hz Schumann Frequency Sound Generator Headset with 40Hz Gamma Sound for Wellness","description":"\u003ch1 data-start=\"132\" data-end=\"172\"\u003eMulti-Frequency Schumann Resonance and Gamma Sound Therapy Headset\u003c\/h1\u003e\n\u003cp data-start=\"174\" data-end=\"456\"\u003eHarmoDuo is a lightweight, behind-the-ear frequency audio headset engineered to deliver structured sound programs centered around \u003cstrong data-start=\"304\" data-end=\"343\"\u003e7.83Hz Schumann resonance frequency\u003c\/strong\u003e, \u003cstrong data-start=\"345\" data-end=\"365\"\u003e40Hz Gamma tones\u003c\/strong\u003e, and precision \u003cstrong data-start=\"381\" data-end=\"421\"\u003ebrainwave entrainment audio patterns\u003c\/strong\u003e in a compact and comfortable form.\u003c\/p\u003e\n\u003cp data-start=\"458\" data-end=\"762\"\u003eDesigned 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.\u003c\/p\u003e\n\u003cp data-start=\"764\" data-end=\"1019\"\u003eUnlike 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.\u003c\/p\u003e\n\u003cp data-start=\"1021\" data-end=\"1203\"\u003eEach 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.\u003c\/p\u003e\n\u003cp data-start=\"1205\" data-end=\"1510\"\u003eWeighing 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.\u003c\/p\u003e\n\u003cp data-start=\"1512\" data-end=\"1716\"\u003eWith 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.\u003c\/p\u003e\n\u003ch2 data-start=\"1723\" data-end=\"1753\"\u003eBuilt-in Frequency Programs\u003c\/h2\u003e\n\u003cp data-start=\"1755\" data-end=\"1876\"\u003e• 7.83Hz Schumann-range binaural tones\u003cbr data-start=\"1793\" data-end=\"1796\"\u003e• 40Hz Gamma pure tones: MIT original and soft version\u003cbr data-start=\"1819\" data-end=\"1822\"\u003e• Gamma ambient soundscapes (Mountain \/ Ocean \/ Dream)\u003c\/p\u003e\n\u003ch2 data-start=\"1883\" data-end=\"1910\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1912\" data-end=\"2222\"\u003eFrequency Response: 20Hz–20kHz\u003cbr data-start=\"1942\" data-end=\"1945\"\u003eAudio Structure: Binaural stereo signal delivery\u003cbr data-start=\"1993\" data-end=\"1996\"\u003ePlayback Format: 30-minute structured loops\u003cbr data-start=\"2039\" data-end=\"2042\"\u003eControls: Volume + \/ Volume – \/ Power \u0026amp; Mode Switch\u003cbr data-start=\"2093\" data-end=\"2096\"\u003eBattery Life: Up to 8–10 hours\u003cbr data-start=\"2126\" data-end=\"2129\"\u003eCharging Port: USB-C\u003cbr data-start=\"2149\" data-end=\"2152\"\u003eWeight: 70g\u003cbr data-start=\"2163\" data-end=\"2166\"\u003eConnectivity: Wireless smartphone connection supported\u003c\/p\u003e","brand":"Prowell Health Products","offers":[{"title":"Default Title","offer_id":47785337520371,"sku":null,"price":59.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/5543\/4995\/files\/harmoduo_main.jpg?v=1772349916","url":"https:\/\/biothm.com\/products\/40hz-gamma-sound-therapy-brainwaves-entrainment-audio-device-headset","provider":"Biothm","version":"1.0","type":"link"}