Tap Into The Earth'S Natural Frequency To Improve Your Sleep Quality. The 7.83Hz Schumann Wave Promotes Relaxation, Reduces Stress, And Helps You Fall Asleep Faster, Leaving You Feeling Refreshed And Ready For The Day With A Range Of 0.01Hz To 20Khz, This Custom Frequency Generator V2 Allows You To Easily Adjust The Frequency To Meet Your Personal Needs, Whether For Better Sleep, Focus, Or Relaxation The 7.83Hz Frequency Offers Multiple Benefits, Including Stress Relief, Improved Mood, And Enhanced Meditation Or Yoga Sessions. Enjoy Deeper Relaxation, Mental Clarity, And Overall Well-Being Made From Durable Abs Material, This Device Is Lightweight And Energy-Efficient, Using Less Than 1W Of Power. It Includes Both Dc And Usb Power Options And Is Easy To Integrate Into Any Space As With Any Sound Or Music Therapy, You Can Feel Confident In Your Purchase And Enjoy The Many Benefits Of Schumann Resonance Colour: B red / C green / A black Material:Metal Package Contents: 1 * frequency generator for healing 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.