Price: $26.99
(as of Jul 28, 2026 03:03:11 UTC – Details)
Product description
Why can’t I hear sound from the device or the included headphones?
The sound is very soft, so little or no sound can be normal. The headphones are only for checking if the device is working and are not needed for daily use. No sound or reaction does not mean the device is defective.
Why hasn’t it helped with sleep yet, and when will I notice the effect?
Results may vary by person and usage habits. This device is designed for gradual daily use, not instant results. Some users notice changes over time, and consistent use may lead to a more noticeable experience.
Does this device need to stay plugged in, or does it have a battery?
This device does not have a built-in battery. It must be connected to a power source while in use.
What does the Backlight/Light button do?
The Backlight/Light button turns the display light on or off. Turning the light off does not affect the normal operation of the device.
Is this device easy to use?
Yes. Once powered on, it works at the default 7.83Hz setting. Adjusting the frequency is also simple. You can refer to the product images or video on the listing page for step-by-step guidance.
Product Dimensions : 6.3 x 4.3 x 0.8 inches; 7.87 ounces
Item model number : SMB-01
Date First Available : March 13, 2026
Manufacturer : blinvcra
ASIN : B0GSFVYNPW
Best Sellers Rank: #71,336 in Health & Household (See Top 100 in Health & Household) #28 in Sound Therapy Products
Customer Reviews: 3.2 3.2 out of 5 stars (55) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
【7.83Hz Schumann Resonance with Quiet Signal Output】Designed to generate the Earth-inspired 7.83Hz Schumann resonance frequency, this frequency generator helps create a calm and stable environment for relaxation, meditation, yoga, and sleep routines. It works with quiet signal-based output, so little to no audible sound during use is normal and does not indicate a defect.
【Wide Adjustable Frequency Range】The frequency range can be adjusted from 0.01Hz to 30kHz, allowing users to explore different frequencies for personal preferences, sound experiments, or wellness applications.
【Multiple Use Scenarios】Supports sine wave output, providing flexible use scenarios, suitable for various environments such as meditation spaces, offices, studios or laboratories.
【USB Powered with Acrylic Case】 Powered by USB for convenient operation at home or on the go. The clear acrylic protective case helps keep the circuit board protected while maintaining a clean and modern appearance.
【portable and Easy to Use】The compact design makes the device easy to place on a desk, bedside table, or meditation area. Simple controls allow quick frequency adjustment for daily relaxation or experimental use.
【Headphone Check for Low Frequencies】This device includes wired headphones for simple output checking. Frequencies below 15kHz can be heard through the headphones, making it easy to confirm the device is working properly. Since it is mainly designed to support a calm and relaxing environment, the sound output is naturally soft and subtle rather than loud.
