What is Blu-ray？
The blue ray emitted by cellphones and flat screens is a visible light wave with a wavelength in the 380-550 nm range that affects circadian rhythms.
Scientific research shows that blue light can damage the retina and easily cause eye diseases of the age-related macular degeneration (AMD).
Exposure to blue light suppresses the secretion of melatonin, which affects circadian rhythms. It has been proven that blunting the blue light can effectively help sleep.
Features：
1.Easy to use, the interface is simple
2.Power saving
3.Blu-ray weakened
9Apps 4.9
