# DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK SM-V3-BLACK: DR TECHNOLOGIES V3 Max is a portable Schumann resonance generator with adjustable frequency settings and silent electromagnetic operation. Its five presets, claimed 24-hour battery life and USB-C charging are aimed at people who want an adjustable device without audio playback. The listing describes its range and operating claims, but does not establish therapeutic benefits. - [Original product page](https://best-deals.pro/product/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [View offer](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - Market: US - Language: en-US - Currency: USD - Brand: DR TECHNOLOGIES - Model: SM-V3-BLACK - Price: 224.99 USD - Previous price: 299.99 USD - Discount: 25% - Price checked: 2026-11-14T06:23:08.068Z - Rating: 4 / 5 - Reviews: 26 Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store. ## At a glance - Five on-device presets can be saved and recalled with one tap, according to the listing. - The listing says it emits an electromagnetic field without sound or vibration, rather than playing audio. - USB-C charging and the claimed battery runtime support portable use, including while charging. ## Pros - Five user-savable presets make recurring settings quicker to recall. - Silent operation may suit spaces where audio playback would be disruptive. - The device is listed as usable while charging, so it need not be limited to battery-only sessions. ## Cons - The adjustable range ends at 9,999.99 Hz, which may not suit buyers seeking a generator with a higher stated range. ## Specifications ### Identity - Brand: DR TECHNOLOGIES - Model: SM-V3-BLACK ### Frequency and operation - Adjustable frequency range: 0.01–9,999.99 Hz - Frequency precision: 0.01 Hz - Waveforms: Dual Sine and Square waveforms - Operating area: 250 ft² - Operation: Silent electromagnetic operation, no sound ### Power and charging - Battery runtime: up to 24 hours per charge - Charging connection: USB-C - Use while charging: usable while charging - Battery: 1 Lithium Ion batteries required. \(included\) ### Dimensions and installation - Dimensions listed: 4.72 x 4.72 x 0.79 inches; 7.41 ounces ## Before you buy - The listing claims up to 24 hours per charge, coverage across 250 ft², and an electromagnetic field, but these performance claims are not independently established. Its sleep, focus, recovery and healing language does not demonstrate a health benefit. ## A good fit for - People seeking a silent, adjustable frequency generator for a bedroom, office or meditation space. - Buyers who want on-device presets and USB-C charging for portable use. ## Less suited to - People looking for audible tones, speakers or headphone playback. - Anyone buying it as a proven medical treatment or expecting established sleep, focus or healing outcomes. ## Customer feedback Aggregate ratings lean positive, with most ratings in the five-star category, but a substantial share are one-star. With no customer comments supplied, the ratings do not explain the reasons for that spread or establish how well the claimed presets, runtime or silent operation work in practice. ## Frequently asked questions ### Does the V3 Max make sound? The listing describes silent electromagnetic operation with no sound or vibration. It is not presented as an audio or speaker-based device. ### What frequency range does it offer? The listing specifies an adjustable range of 0.01–9,999.99 Hz and 0.01 Hz precision. ### Can its presets be changed? According to the listing, hold a preset button for two to three seconds to save a frequency, then tap it to recall that setting. ### How long does the battery last? The listing claims up to 24 hours per charge and says the device can be used while charging. Actual runtime is not independently established. ### Does it have a demonstrated health benefit? The listing markets it for sleep, focus, recovery and meditation, but the supplied information does not establish that it produces those outcomes. ## Alternative options - [HealPul Schumann Resonance Generator, Adjustable from 0.01Hz-200kHz, Frequency Generator with Timer and USB-C Rechargeable, Suitable for Bedroom Meditation, Yoga](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Frequency Generator with Timer\|Adjustable Schumann Resonance Generator\|0.01Hz-200kHz \| Meditation, Improves Work Focus USB Powered, Suitable for Home, Office, and Travel](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Adjustable Frequency Generator For Healing Schumann Sine Waves \| 0.01Hz-200kHz, Resonance Machine 7.83Hz, USB-C Powered Frequency Generator Resonator with Acrylic Case](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Frequency Generator for Healing \| Frequency Generator Resonator \| Sound Frequency Machine with Type-C \| 0.01-200000Hz Adjustable Schumann Sine Wave Resonance Generator](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Frequency Generator for Healing – 7.83Hz Schumann Resonance \| Sound Therapy Device with Acrylic Case for Sleep aid, Meditation, Stress Relief & Yoga \(0.01Hz–200kHz\)](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [HealPul Rechargeable Schumann Resonance Generator, Suitable for Meditation \| With Timer Acrylic Case Adjustable Frequency Sine Wave and Square Wave Long Battery Life 7.83Hz Ultra Low Frequency](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [7.83Hz Schumann Frequency Generator, USB-C Timer for Meditation \| 0.01Hz-200KHz Adj...](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Frequency Generator for Healing \| Schumann Resonance Generator with Timer \| 7.83Hz ...](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [7.83Hz Frequency Generator for Healing, Frequency Generator Resonator \| 0.01Hz–30kH...](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Frequency Generator for Healing, 7.83Hz Schumann Resonance Generator \| Adjustable 0...](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Rechargeable Schumann Resonance Generator, 0.01Hz-100KHz Adjustable Frequency with ...](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Koolertron DDS Signal Generator Counter 80MHz Dual-Channel \| 2.8in Screen Display, Arbitrary Waveform Generator Frequency Meter, 275MSa/s Function Generators for Scientific Laboratories](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) ## Add-ons - [Dr. Royal Rife’s Healing Frequencies: Unlock the Secrets of Rife Machines to Cure Cancer,Aids,Lyme Disease with Clear Details of Listed Frequency for All Causes](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) - [Dr. Royal Rife - Forbidden Frequencies: The Suppressed Story Behind the 1934 Frequency Experiments + Your Complete Guide to Rife Technology, Protocols & Frequency Therapy](https://best-deals.pro/visit/dr-technologies-schumann-frequency-generator-v3-max-sm-v3-black) ## Images ![DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK — 1](https://best-deals.pro/i/PE4mONpgBjU2C7BMyhZMTGThCQMLaGOM65YcLLXcaI2qzgfLI1UkNm_bjapWrLSfF1WUNO9NdivpENZmfyAP2ccyRtYqqzgKAJlRbMCrvBo1sQj3ipTkvLJl.jpg) ![DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK — 2](https://best-deals.pro/i/R_jJdiP_qDIKdoyzGBjmx-22z8pSfYbFm2vxEXBMGHVi50xEmiMf_m9uZYbVkyNA5W6oVZI3taQze-HOCxllOPWVt1AttCpVaxrX5Bo0ZbRz0neO_AXuvblN.jpg) ![DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK — 3](https://best-deals.pro/i/HS9RjPX9qUdIL8v5Vb4RayBtFdLXopqctn-WTLGlmttV5ClAHYIE-frO9bbp9NF1aHZQb2ck-XlBfOvQDHefXj1hUQfW3QdZH9sUbd60l10-d8j6WTpo9P6Q.jpg) ![DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK — 4](https://best-deals.pro/i/S0O5y3EoJHF1D0B1IpSZXRJJMRlxTW8K8Sy6WZs7ZK48zyOkdYQp-t0fpVWozO0-zYRzLF-evJvZgJ0KSkq2UHFHQS-mQO9T-Cq59bKpeoOgh_omz_o6QJH5.jpg) ![DR TECHNOLOGIES Schumann Frequency Generator V3 Max, SM-V3-BLACK — 5](https://best-deals.pro/i/4B_Bm3BpEN_A-EuQZIR42LhXJpzu7aSbKkuSsqF1vyNL-9ztArXtGxVHt62rrza_HljDaorNR9SqYTd8w4MEcO0rihy0TR3VJceAagnGwqjG9hYVw3mztnv-.jpg)