The MIDAS TSP1 is a versatile prism scope from Athlon. It utilizes a prism to deliver a clear and vibrant image. The design of this scope with a prism allows for a more compact size without compromising optical quality. One notable feature of the MIDAS TSP1 is its dual illumination, offering both Red and Green options. Even if you forget to turn it on or if the batteries run out, the etched reticle remains visible without a battery installed. These Athlon prism red dots are built to withstand various environmental conditions. They are nitrogen-filled, ensuring they are fog-proof and shockproof. The reticles are etched directly onto the glass, providing consistent point-of-aim accuracy at all times. Whether the illumination is turned on or off, the reticle remains visible.