The HE509T-GR is an enclosed 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. In the Box: RMR AdapterT10 L KeyLens ClothUser ManualFeatures of the Holosun HE509T-RDMRS: Circle Dot; Dot Only12 Brightness Setting: 10 DL & 2 NV CompatibleUp to 50,000 Hours Battery Life (Setting 6)Parallax-free & Unlimited Eye ReliefShake Awake™Enclosed Design & Titanium Housing Holosun HE509T-GR Titanium Multi-Reticle Green Circle Dot Enclosed Reflex Sight w/Solar Failsafe & Shake Awake HE509T-GR