The Zeiss Victory RF 10x54 Binocular Rangefinders combine the finest quality optical glass, a given with anything in the Zeiss Victory Line, with a laser rangefinder and ballistic computer. The laser rangefinder provides readings of reflective objects from 10-2500 yds, accurate to ±1 yd. Bluetooth connectivity lets you utilize the Zeiss Hunting App on your mobile device. Through the app, you can customize device settings, weather, location, and ballistic information. You can set up ballistic profiles within the app and import up to 9 of them to your Victory RF. It will combine this data with environmental factors (e.g. temperature and air pressure) and your relative position to your target to calculate the best setting for BDC (bullet drop compensation). The optical components are as good as they come, featuring FL lenses with a T* coating and an Abbe-König prism system that deliver the brightest, clearest images possible with no chromatic aberration or distortion. This 10x54 size is particularly useful for long distance viewing in low light and the LotuTec hydrophobic lens coating keeps water and debris from interfering with your view.