Feature: 1. Working Principle: Schumann wave itself does not emit any sound, and does not connect to other equipment, only plugged into the electricity can be used. It works on the space environment, providing a specific frequency to improve the sound and picture quality. 2. Relaxing: 7.83Hz Schumann wave generator to offset the frequency of electromagnetic waves radio waves negative interference, make a stable and harmonious music space, let people relax physically and mentally, improve the human body's perception of sound and images, improve human health. 3. Multi Application: Can be used in create space, bedroom (treatment of insomnia), office (improve work efficiency), sound visual space (enhance the sound field and sound visual effect), tea ceremony, spirituality, meditation space (quiet body and mind). 4. Applicable Container: Ultra low frequency pulse generator, suitable for glass, porcelain, iron and other water container, can not use the inner liner of the rice cooker, because aluminum, copper and other products can not let the 7.83Hz low frequency through the container. 5. Easy To Use: Access to the power supply, turn on the switch, the first purple LED light to 7.83hz frequency flashes to prove that the machine is working properly, the time to activate the water is about 20 minutes, the longer the effect of the better. Specification: Item Type: Ultralow Frequency Pulse Generator Material: ABS Output Voltage: DC5V, 0.5A Output Power: 2.5W Output Frequency: 7.83Hz. Package List: 1 x Ultralow Frequency Pulse Generator1 x USB Cable Note: The package includes only a USB cable, which can be directly plugged in for use. Alternatively, you can choose to use a DC5V adapter (not included).