Testing devices PRK-1U, Belgrade 21. 5. 2016

Saturday, 21. 5. 2016, We performed tests for the development of concentration "PRK-1U”

Under the leadership of Dr.. Grigori Grabovoi concentration was performed on four management objectives without switching on the device and the device switched on. Each participant after testing described the difference between the course of the concentrations of free and with a lighted device.

More about the product “PRK-1U”…

Video testimonials of participants …