The ATIBAL AT-MCRD Micro Red Dot is a small, light, and rugged reflex sight utilized for quick target acquisition. The AT-MCRD is designed for two eyes open, which greatly improves target acquisition speed and situational awareness. It's parallax free design allows for unlimited eye relief. With the ATIBAL AT-MCRD, the functional design allows for quick and easy battery replacement (AAA) and no need to special order batteries unexpectedly. With 18 brightness settings the dot will always be bright and will not wash out due to bright daylight surroundings.