Keep a constant eye on atmospheric pressure changes to take full advantage of the best times to be on the lake. When the barometer is on the rise, the needle moves through the multicolored key to let you know the fish are at their best. A red indicator shows you where the needle was at the last time you set it to give an instant indication of rising or falling pressure. The rubberized body provides an easy grip, wet or dry. And it comes with a lanyard to prevent accidental drops.