This is the most versatile belay device on the market, made specifically for alpine mountaineering. The Alpine Up can be used with twin, half, or single ropes and can function in three different modes; dynamic, click-up, and guide mode. In the dynamic mode, it functions just like a classic tube belay, but switch it to click-up mode and you have an auto-locking assisted belay that can catch a fall for you if you let your guard down. In guide mode, the Alpine Up can be attached directly to the anchors to belay climbers with full auto-locking functionality. The Alpine Up is so versatile it can be used with many other advanced applications. The possibilities are almost endless.