Designed for use with Sig Sauer P238/P938; Ultra lightweight and compact; LED illuminator and a 640-660nm red laser; 100 lumens; 89m beam distance; 2,000 candela; Uses two CR1/3N lithium batteries (included); Batteries can be replaced while light remains mounted on gun; No need to resight laser after battery change; Windage and Elevation adjustment screws mounted in brass bushings for long life and dependable zero retention of laser; IPX4; water resistant; 1m impact resistance tested; Serialized for positive identification