1、This product is Schumann wave 7.83HZ very low frequency generator, features high accuracy and stability 2、High s frequency acquisition elements: high stability pulse chip, accurate correction capacitance, accurate multi‑loop adjus resistor 3、High quality polymer batteries, with overcharged, overvoltage, overcurrent protection. There is almost no voltage ripple in the voltage supply 4、With work toggle switch, easy to use 5、Schumann wave can be applied to HIFI or sleep Descriptions:Schumann wave itself is not directly acting on the sound or video products to improve the quality of sound quality, but the role of the space environment, people's physical and mental relaxation, improve the body's perception of sound and images, improve the health of the human body to improve the efficiency of work, mental sess also have a better effect.Features:This product is Schumann wave 7.83HZ very low frequency generator, features high accuracy and stability.High s frequency acquisition elements: high stability pulse chip, accurate correction capacitance, accurate multi-loop adjus resistor.High quality polymer batteries, with overcharged, overvoltage, overcurrent protection. There is almost no voltage ripple in the voltage supply.With work toggle switch, easy to use.Schumann wave can be applied to HIFI or sleep.Specifications:Model: CF-FM783-BAPower: 3.7V for android charging cablePolymer battery capacity: 1200mahTime: charging current 250mA, 6 hours full of elecicityWorking current: 7mAWorking time:00 hoursfull of elecicitySize: Approx. 7 x 5.5 x1cm/2.76 x 2.17 x 0.39inchWeight: 83gSchumann wave applied to HIFI:1. The player has a certain HIFI experience, HIFI equipment level can not be too low.2. Can hear, the difference between the same system on the different wire to bring the tone changes.3. It is recommended to buy two sets ofial the effect is better.4. when the product will be placed on the speaker, plus the appropriate weight for anti-vibrationeatment.Schumann wave applied to sleep:1. It is recommended to buy a set ofial, on a bedside, more than 1 meter away from the human body distance.2. Theial, plus the appropriate weight for anti-vibrationeatment.3. The appropriate use of paper cloth cloth block indicator light, remove the product at night light4.y it for a week and analyze seven days of experience.Package Included:1 x Ula-low frequency pulse generator 1 x USB cable1 x ScrewdriverNote:1. Package included a generator, power supply are not included.2.This item is finished product, not need to assemble.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.