7.8Hz Schumann wave 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 music 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: Black Material: Plastics Power Supplys: Type-C Port Resonant Frequency: 7.8Hz (Adjustable) Item Size: 100 * 82mm / 3.9 * 3.2in Item Weight: 18g / 0.6oz Package Size: 130 * 85 * 10mm / 5.1 * 3.3 * 0.4in Package Weight: 24g / 0.8oz Packing List: 1 * Schumann Resonance Generator When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!