Effective range in the dark:Green beam: 500 ± 100 m. IR beam: 400 ± 100 m. The triangular area on the host can switch between visible laser and IR. IR light source: wavelength – 850 nm. Perst-4 contains 2 laser functions:Green Laser light source: wavelength – 532 nm/IR light source: wavelength – 850 nm.