7.8Hz Adjustable Schumann Waves Ultra-Low Frequency Pulse Generator Sleep Improver Schumann Waves Generator USB Power Su

Features 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 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 power whether you are a novice or an amateur you can use it quickly Specifications Material plasticsDisk diameter 82mm 3 2inPower supplys Type c portResonant frequency 7 8Hz adjustable Package size 100 x 82 x 20mm 3 9 x 3 2 x 0 8inchPackage weight 18g 0 6ouncePackage Included 1 x Schumann Resonance Generator