Feature: 1. 7.83Hz Low Frequency: This Schumann wave generator uses excellent chip, and the 7.83Hz ultra low frequency pulse wave helps improve sleep, relieve fatigue, recover physical and mental health. 2. Applicable Scenes: Suitable for office work, improving work efficiency; Suitable for creation and enhancing inspiration; Suitable for tea ceremony, helping to relax the body and mind. 3. Sleep Improvement: Schumann is beneficial for improving the taste of water, relieving stress, reducing surrounding electromagnetic radiation, and placing it by the bed can help improve sleep quality. 4. Good Performance: The 7.83Hz low frequency Schumann wave resonance generator has high accuracy and good stability, greatly improving work efficiency and reducing mental stress. 5. Applicable Materials: This Schumann wave generator is suitable for glass cups, porcelain, iron, etc. It cannot be applied for aluminum copper products, otherwise it will pass through the container. Specification: Item Type: Schumann Wave Generator Input Voltage: DC5V 0.5A Output Power: 2.5W Output Frequency: 7.83Hz Function: Helps improve sleep quality, enhance water activity, magnetize water, resist external electromagnetic radiation Size: Approx. 80 x 100mm / 3.1 x 3.9in. Package List: 1 x Schumann Wave Generator 1 x USB Power Cord