The Predator 3 is optimized for digital devices, but it also works with valve devices. It has two high-end infrared emitters with a wavelength of 850 nm or 940 nm each. The operating wavelength can be freely selected. No need to change the issuer! Focusable and adjustable. Batteries (2x included) can be charged with a USB cable. Includes Picatinny mounting and corner bracket for side mounting.