The STS is C-MORE Systems smallest reflex sight. The STS head up display provides an unobstructed sight picture in which the red dot hovers on the sight line, illuminating the point of impact on the target, creating the fastest target acquisition. Similarly it uses a beam-splitter lens made of glass. It's hard coated for maximum scratch resistance, and light transmission, while the parallax free design enables targets to be acquired without the need to center the dot in the lens which is what you usually find on cheaper Red Dot Sights.
The STS uses a CR2032, lithium battery that is contained within a removable battery tray which permits battery replacement without dismounting the sight; this eliminates the need for re-zeroing when replacing a battery. The battery tray is O-ring sealed, and is part of the waterproofing that goes into every RTS. A 3 position switch provides automatic intensity adjustment, a high brightness setting and an off position.
The STS provides infinite adjustment capability. By eliminating "clicks", the adjustments can be set to exact positions, resulting in pin point accuracy. A positive locking screw for both windage and elevation lock the adjustment screws in position.