Auto Belay Device Rock Climbing, An Auto Belay Device is an automatic belay device that prevents the slack in the climbing line while the climber climbs up. Whether you are a gym climber, trad climber, sport climber, alpine climber or all of the above, our goal here at The Adventure Junkies is to help you pick the best belay device and get you one step closer to your next adventure. Advanced, magnetic zip line brakes that empower safer and more exhilarating zip lines. Automotive Forums . You can instead use it to redeem gamepass. 70 votes, 165 comments. Xbox app shows that my February goal has been met and it will redeem on 2/1. The device enables a climber to ascend indoor routes on a top rope but without the need for a human belaying partner. Bring free fall to all! The thrill of bungee jumping or skydiving in a safe and controlled envirnoment. Below we provide the necessary details for the four styles, including our top picks for each.