The HE508T-RD is an open reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. Features of the Holosun HE508T-RDMRS: Circle Dot; 2 MOA Dot; 32 MOA Circle12 Brightness Setting: 10 DL & 2 NV CompatibleUp to 50,000 Hours Battery Life (Setting 6)Convenient Tray Battery CompartmentParallax-free & Unlimited Eye ReliefSolar FailsafeShake AwakeIn the Box: Picatinny MountT10 L KeyLens ClothUser ManualCR1632 Battery Holosun HE508T-RD-V2 Titanium Multi-Reticle Circle Dot Open Reflex Sight w/ Solar Failsafe and Shake Awake - HE508T-RD-V2