7.83hz For Schumann Wave Extremely Low Frequency Pulse Generator Comprehensively Optimize The Circuit And Upgrade Materials Used In Spaces - To Improve Inspiration; Used In Bedrooms - To Help With Sleep, Soothe The Mind And Treat Insomnia; Used In Offices - To Relax The Mind And Body And Improve Work Efficiency; Used In Audio-Visual Spaces - To Improve The Sound Field And Audio-Visual Effects; Used In Tea Ceremonies, Spiritual Practice, Enlightenment Space-Quiet Mind And Body.The For Schumann Wave Itself Does Not Emit Any Sound, Nor Is It Connected To Other Equipment. It Can Be Used By Just Plugging In. It Does Not Directly Act On Audio Or Video Products To Improve Sound And Picture Quality, But Acts On The Spatial Environment To Provide A Way To Improve Sound And Picture Quality. The Specific Frequency, For Schumann .83hz, Offsets The Negative Interference Frequency Of Electromagnetic Waves And Radio Waves, Making The Reverberation In The Sound Space Stable And Harmonious, Allowing The Listener To Enjoy Music More Attentively And Happily. Improve The Human Body'S Perception Of Sounds And Images, Improve The Human Body'S Health And Increase Work And Efficiency. It Also Has A Good Effect On Insomnia, Mental Stress, Etc. Description: Product Name: For Schumann Wave Extremely Low Frequency Pulse Generator Rated Voltage: DC 12V Rated Current: 1.0A Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, the , the Philippines, Taiwan and so on. voltage: AC100-240V size: About 100 x 86 x 15mm (lengthxwidthxheight) Material: plastic+metal colour: As Shown Package Contents: 1 x Signal Generator Module 1 x US Plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.