Ct Alpine Up Belay Device/HmsThe Alpine Up Belay Device Is A Highly Versatile Assisted Braking Device For Belaying And Rappelling; Developed Especially For Mountaineering. It Can Be Used With Twin, Half, Or Single Ropes. The Alpine Up Has Three Modes: Dynamic, Click Up, And Guide. In Dynamic Mode, The Alpine Up Functions Exactly Like A Tube Device For Standard Belaying And Rappelling. In Click Up Mode, It Acts As An Assisted Braking Device That Will Catch Any Fall. In Guide Mode,