The HS507C is an open reflex optical sight designed for pistol applications. Features include Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. Features of the Holosun HS507CMRS: 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 KeyCR1632 BatteryLens ClothUser Manual Holosun HS507C-V2 Multi-Reticle Circle Dot Open Reflex Sight w/ Solar Failsafe and Shake Awake - HS507C-V2