Schumann Resonance Wave Pulse Generator with USB Cable & Screwdriver Chargeable 7.83HZ Schumann Wave Ultra-Low Frequency Pulse Generator & Audio Resonator

Features:
The 7.83HZ Schumann Wave can help people relax physically and mentally, improve body health and work efficiency, reduce mental stress.
The 7.83HZ Schumann Wave Ultra-Low Frequency Pulse Generator is of high accurancy and stability.
The pulse generator is adopted with high stable frequency acquisition elements, precision correction capacitance, precision multi-loop adjustable resistor, display solid capacitance.
Equipped with high-quality lithium polymer battery, with overcharged, over-voltage, over-current protection. There is almost no voltage ripple in the voltage supply.
You can apply it in your bedroom, office, study, tea room and so on.  
Easy to operate, with a USB cable and a screwdriver for easy installation.

Specifications:
Battery: Lithium polymer battery
Battery capacity: 850mah
Time: charging current 250mA, 6 hours full of electricity
Working current: 7mV
Working time: 200 hours(full of electricity)
Power: 5V micro-usb android charging cable
Material: Metal
Color: Multicolor
Weight: 71g/2.5oz
Item Size: 6.8*5.2*1.2cm/2.7*2*0.5in
Package Size: 10*6cm/3.9*2.4in

Package List:
1*Ultra-low Frequency Pulse Generator
1*USB Cable
1*Screwdriver