Vender Portable Schumann Wave Generator Sleep Improver Ultralow Frequency 7.8Hz al mejor precio

Description: Schumann resonance (SR) 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 power by type-c cable, no battery included, which is convenient to use. You can use it in your home to relax sleep, 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 power, whether you are a novice or an amateur, you can use it quickly. Specification: Material: Plastic Power supplys: Type-c port Resonant frequency: 7.8Hz (adjustable) Size Chart: 82X100mm/3.23X3.94inch Package Includes: 1 Piece Schumann Waves Generator Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!