This product is .83HZ very low frequency generator, features high accuracy and stability.
High stable frequency acquisition elements: high stability pulse chip, correction capacitance, multi-loop adjustable resistor.
High quality polymer batteries, with overcharged, overvoltage, overcurrent protection. There is almost no voltage ripple in the voltage supply.
With work toggle switch, easy to use.
wave can be applied to HIFI or sleep.

Power: 12V 1A android charging cable
Polymer battery capacity: 2300mah
Working time: 200 days(full of electricity)
Material: Metal
colour: black

Package Contents:
2 x Ultra-low frequency pulse generator