The Puck 4 is a compact diving computer from Mares. It not only sports a sleek new design and vibrant colors on the outside but also boasts cutting-edge technology within. With the Bühlmann ZH-L16C algorithm featuring customizable gradient factors, you'll have complete transparency and control over your decompression process. What's more, integrated Bluetooth functionality enables direct downloading of your dive data to a smart device for easy access and analysis. Bühlmann ZH-L16C algorithm with customizable gradient factors Air, nitrox, bottom timer Multigas capable, up to three gases Clear segment display made using chip-on-glass technology with 800 segments Bottom timer mode with resettable average depth and stopwatch Decompression dive planner with user-adjustable surface interval Logbook capacity of 100 dives (including graphs via the Mares app) User-replaceable battery (CR 2450) with a long battery life of 100 dives Integrated Bluetooth for direct connection to a smart device Sin