Accurate and Exactness Performance: This Pulse Generator is adopted with high stable frequency acquisition elements, it includes high stability pulse chip, Exactness correction capacitance, Exactness multi-loop adjustable resistor, display Firmcapacitance, all of them an accurate and high precise working with a good durability Accurate and Exactness Performance: This Pulse Generator is adopted with high stable frequency acquisition elements, it includes high stability pulse chip, Exactness correction capacitance, Exactness multi-loop adjustable resistor, display Firmcapacitance, all of them an accurate and high precise working with a good durability Premium Quality: This product Schumann .83HZ very low frequency generator, which features with high accuracy and great stability. At the same time, it is adopted with high quality polymer batteries, with overcharged, over-voltage, over-current protection. There is almost no voltage ripple in the voltage supply Multi-functional: The Schumann wave can helps relax people's physical and mental, and it helps improve the body's perception of sound and images, and it also helps improve the health of the human body to improve the efficiency of work, and the condition of mental stress also has also improved Widely Applications and excellent Results: This Schumann resonance pulse generator has a widely application in . It can be applied to HIFI or sleep, and it also has a good effect on insomnia. Easy to Operate: This Schumann Generator is designed with work toggle switch to offer an easy operation, and it comes with a cable and screwdriver for easy installation Model: -FM783- Power supply: Android 5V charging cable Polymer battery capacity: 1400 mah Time: charging current 250 mA, 6 hours full of electricity Working current: 1mV Working time: 200 hours (full of electricity) Schumann wave applied to HIFI: 1. The player has some HIFI experience, the level of HIFI equipment can not be too low. 2. It can feel, the difference between the same system on the different thread to bring the tone changes. 3. It is recommended to buy two sets of tests (the effect is better). 4. When the product will be placed on the speaker, plus the appropriate weight for anti-vibration treatment. The Schumann wave applied to sleep: 1. It is recommended to buy a series of tests, on the side of the bed, more than 1 m from the distance of the human body. 2. The test, plus the appropriate weight for anti-vibration treatment. 3. Appropriate use of paper cloth block indicator light, remove the product at night light Colour:Photo Color Material:ABS Size:68 x 52 x 12mm Package Contents: 1 x Ultra Low Frequency Pulse Generator 1 x USB cable 1 x Screwdriver Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.