Set behind 28mm of aspherical, fully multi-coated glass, the Zero Tech Optics Trace H.A.L.O Reflex Sight puts a 3 MOA red dot in a sealed window so rain, dust, and gas blow-back stay off the emitter while shooters track targets with both eyes open. The 3 MOA dot subtends about 9 cm at 100 meters, precise enough for deliberate placement and bold enough to pick up in a hurry, across 10 brightness levels that span night vision lows to full daylight. A top-loading CR2032 battery swaps without removing the optic from the host, so zero stays put, and up to 50,000 hours of battery life keeps the dot ready between range days. Built on the Shield RMSc footprint with an included Picatinny rail adapter, the Trace H.A.L.O mounts to a wide range of hosts for offset work, close-range hunting, or a target pistol, and the 7075 aluminum body with IPX7 sealing holds up to field conditions. 28mm aspherical, fully multi-coated lens for an unusually wide sight window with minimal distortion 3 MOA red dot with 10 brightness levels, including night vision-compatible settings Enclosed emitter sealed on both sides of the window against rain, dust, and gas blow-back Top-loading CR2032 battery, rated up to 50,000 hours, swaps without disturbing zero Shield RMSc footprint with an included Picatinny rail adapter for offset and rifle mounting 7075 aluminum body with a protective frame lip IPX7 waterproof sealing Digital controls with auto on and off, plus motion wake What's in the box: TRAE28 Heavy-duty Aspherical Lens Optic (H.A.L.O) Protective rubber slip-on storage cover Picatinny rail adapter (fitted) Torx wrench and sight adjustment tool Microfiber lens cloth Welcome card with QR code link to product manual