The Unity Tactical SPARK is a compact, ultra-lightweight infrared marker light engineered for rapid personnel identification during night operations. Fully encapsulated in a flexible, waterproof silicone housing, this durable unit thrives in the harshest environments without risk of water damage. It features an intuitive, central push-button interface that cycles seamlessly through Constant Low, Constant High, Blink, and Off configurations. With a pre-installed, non-replaceable internal battery, it delivers a massive runtime of over 200 hours to ensure long-lasting signaling capability. The integrated hook-and-loop backing enables immediate, secure mounting onto helmets, plate carriers, or chest rigs.