Schumann Wave GeneratorMade of high stability pulse chips, precision correction capacitors, and precision multi loop adjustable resistors.Rechargeable large capacity lithium batteries can be used for about 400 days at a time after being fully .It is beneficial for people's physical and mental relaxation, improving their perception of sound and image, and improving human health.Improve work efficiency and reduce mental stress. Super low frequency resonances wave generator, with high accuracy and stability.The working status indicator light (red, green, or frequency flashing blue) allows you to clearly see its working status.Made of high stability pulse chips, precision correction capacitors, and precision multi loop adjustable resistors.Rechargeable large capacity lithium batteries can be used for about 400 days at a time after being fully .It is beneficial for people's physical and mental relaxation, improving their perception of sound and image, and improving human health.Improve work efficiency and reduce mental stress. Super low frequency resonances wave generator, with high accuracy and stability.The working status indicator light (red, green, or frequency flashing blue) allows you to clearly see its working status.Color: BlackMaterial: plasticPackage Contents:1 x resonance generatorOnly 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.