Ncstar 1x35 MKIII tactical combat dot sight. Features PRO Patrol Optic style design, LED dot for long life and safe for the eyes, unlimited eye relief, black finish, red, blue, or green dot with adjustable brightness levels. Includes offset cantilever mount for Picatinny rail, and flip up lens covers. Used 3v CR232 battery. Mfg # DRGB135.