https://www.iwa.info/en/ausstellerprodukte/iwa22/product-10297563/he503r-gd

The HS503R is a micro red dot optic that features Holosun’s new rheostat dial to adjust brightness settings. Employing Holosun’s ultra-efficient LED technology, The HS503R can achieve a battery life of up to 5 years. This optic also features Holosun's Multi-Reticle System™ with three choices: A 65 MOA circle and dot reticle, or a 2 MOA dot only reticle.

Since 2013, Holosun has been committed to creating innovative optic and laser/IR technologies for a broad range of shooting, hunting, law enforcement and military needs. Today, Holosun is at the forefront of developing new features including innovations such as; up to a 100,000 hr battery life, Solar Fail-Safe technology, Our signature multi-reticle system (MRS), and much more. At Holosun, its simple. We are obsessed with producing cutting-edge equipment with superior quality, at a price that astounds the customer. Holosun is the industry leader in designing feature rich, high quality products. After comparing our products to the competition, we believe you will agree with us when we say, “Holosun, Your Next Optic”.