Feature:1. 7.8Hz ultra-low frequency pulse Schumann generator has high accuracy and nice stability.2. Equipped with high stability pulse chip, accuracy correction capacitor and multi-loop adjustable resistor.3. It can turn ordinary water into Shumangbo water, antioxidant, easy to absorb, and improve the oxygen delivery capacity of bloods after drinking, which is beneficial to health.4. It can be placed in the bedroom to improve the quality of sleep, or in the office to relax and improve work efficiency.5. Used to make the sound more pleasing, or used to make tea to speed up the brewing and make the tea smell more intense.6. USB plug and play, easy to use, can be used in the bedroom, study, office, tea room, etc.Specification:7.8Hz Schumann waves pulse generator has high accuracy and nice stability, which can make you relax and reduce mental stress and is beneficial to human health.Features:7.8Hz ultra-low frequency pulse Schumann generator has high accuracy and nice stability.Equipped with high stability pulse chip, accuracy correction capacitor and multi-loop adjustable resistor.It can turn ordinary water into Shumangbo water, antioxidant, easy to absorb, and improve the oxygen delivery capacity of bloods after drinking, which is beneficial to health.It can be placed in the bedroom to improve the quality of sleep, or in the office to relax and improve work efficiency.Used to make the sound more pleasing, or used to make tea to speed up the brewing and make the tea smell more intense.USB plug and play, easy to use, can be used in the bedroom, study, office, tea room, etc.Specifications:Color: BlackMaterial: PlasticsPower Supplys: Type-C PortResonant Frequency: 7.8Hz (Adjustable)Item Size: 100 * 82mm / 3.9 * 3.2inItem Weight: 18g / 0.6ozPackage Size: 130 * 85 * 10mm / 5.1 * 3.3 * 0.4inPackage Weight: 24g / 0.8ozPacking List:1 * Schumann Resonance GeneratorPackage List:1 * Schumann Resonance Generator