According to the principle of dream machine, the flickering light of various frequencies will have an impact on the brain, so that the brain can synchronize the frequency of the light.

By setting different resistance values, the set frequency can be changed. Useful frequencies are about 0.5hz 6hz 7.8hz 9.5hz 40hz. The frequency used by the dream machine is between 6hz and 10.5hz. The 40hz red flash is very effective in the treatment of Alzheimer's disease and can improve memory.

Three selectable frequencies can be set via resistors：

0.5HZ=200K      6HZ=24k      9.5HZ=15K      7.8HZ=18K      40HZ=3.3K   13HZ=11K

The S2 switch can switch between the set three frequencies.

Power supply: 12V BATTERY

LED: 50pcs

Welded: not welded

12v dry batteries are not included in the kit for shipping reasons