The S1+ is one of the most advanced beacons on the market. With a design reminiscent of a flip phone (remember those?), opening it automatically puts you in search mode and the relative positions of up to four victims appear on the large digital display with a 4+ symbol if there are more. It has a range of 50 meters and a ton of features, including an inclinometer and Smart Antenna Technology that analyzes your burial position to optimize signal transmission. Mass- and deep-burial modes are available and useful for professionals.