The Suunto Vyper is a robust, multi-functional dive computer that can be switched to various modes to suit a wide range of diving conditions. UFD-VYPERBK Product Overview Air, Nitrox, and Gauge modes Backlight Suunto RGBM Durable and highly resistant Suunto Algorithm The Suunto RGBM (Reduced Gradient Bubble Model), the heart of Suunto dive computers, is an algorithm for safer diving, using bubbles as an indicator to reduce pressure differences. Suunto continues to promote the integrity of RGBM, pursuing the best model for all types of diving. Suunto has been developing the RGBM algorithm with Dr. Bruce Wienke for over a decade. *Battery replaced and inspected, so you can use it with confidence immediately after purchase. Pressure tested. Please check the images carefully before purchasing. *Returns are not accepted. Please take a look if you'd like! I'm listing various diving equipment! #divingwatch #divecomputer #diverswatch #divingwatch #divecon #SCUBAPRO #SAS #SUBGEAR #TUSA #GULL #MANTIS #Cressi #Scubapro #WorldDive #Apollo #Mares #Aqualung #scubadiving #freediving #snorkeling #snorkeling #snorkel #snorkel #marinesports #mouthpiece #diving #blacksilicone #mouthpiece #regulator #octopus #scubadiving #snorkeling #snorkel #fins #3piece set #sportstype #diving #gender #ladiesandgents