2Pcs 7.8Hz Schumann Waves Ultra-Low Frequency Pulse Generator Sleep Improver Schumann Waves Generator USB Supply

Schumann resonance () are a set of spectrum peaks in the extremely low frequency (ELF) part of the earth s electronmagnetic field specturm. This schumann waves generator with high precise and fine stability give you a better using experience. You need to connect it with the by type-c cable no battery included which is convenient to use.(not included type-c cable) You can use it in your home to reduce your insomnia also can use it in the office to improve work efficiency. It has a wide ranges of uses. Easy to operate you can use it directly after plug in the whether you are a novice or an amateur you can use it quickly. This schumann waves ultra-Low frequency generator can be used in yor home to reduce your metal stress also has a fine effect on insomnia. supplys: Type-c port Resonant frequency: 7.8Hz (adjustable) (No battery can not be charged link type-c cable for supply not included type-c cable) Colour:black Material:Plastic + Electronic Accessories Size:82mmX100mm Package Contents: 2 x Schumann Resonance Generator 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.