The Bushnell AR Optics TRS-26 Red Dot goes beyond its historic predecessor with improvements in several key areas including longer battery life, bigger objective lens, and with a sharper 3 MOA dot and push button operation. The TRS-26 is powered by 1 CR2032 battery and sets the industry standard with more than 50,000 hours of battery life. Black with 3 MOA Dot reticle User-selectable auto-off timer Waterproof Construction - O-ring sealed optics stay dry inside, even when totally immersed in water. Shockproof construction - Built to withstand bumps, bangs, drops and the rough-and-tumble environment of the field. Nitrogen Purged Fog-Proofing - Nitrogen inside Mfg: Bushnell