Designed from the ground up to ensure clarity solid function and rapid target acquisition. Fits most subcompact optics ready pistols that use the Shield Standard footprint. Tested in the harshest conditions to ensure your optic will be ready whenever you need it with integrated rear sight. Auto off after 2 minutes. With 2 night vision brightness settings the RFX15 is the perfect optic for your pistol in any light condition. IPX6 waterproof.