The Jockey 640 easily mounts in front of your existing 1-6x day scope with no additional zeroing required, working flawlessly with most optics under 5x magnification. The Jockey's compact and lightweight design keeps your favorite .308, rimfire, airgun, or crossbow nimble and responsive. This unit boasts the high-performance ArmaCORE 640 thermal core, fast 60Hz frame rate for smooth operation and industry-best, outstanding visual acuity, based on Armasight's Iron Wolf thermal technology platform. An extensive suite of features includes video and image capture, USB video stream, USB-C interface for viewing your recordings and photos on external devices such as computers or televisions. The Jockey 640 offers multiple color palettes, intuitive simple 3 button controls, a quick detach mount, and long battery life. Multiple Color Palettes Intuitive 3-Button Controls Reticle (for Digital Zoom) 4 Hours runtime, uses two CR123A batteries, included Image Detail Enhancement Simple Alignment for Digital Zoom Capabilities Quick Detach Mount Included Video Recording & Image Capture USB Video Stream USB-C Interface for External Devices Reticle ON/OFF Selection Battery Status Indicator ULTEM Composite Body and Ergonomic Design Designed and Assembled in the USA from U.S. and Global Components