mares avanti quattro 4x copyBeginner friendly Large easy to read display Nitrox ready The Mares Puck Pro combines sleek design, intuitive controls, and dependable performance in one budget friendly package. Its single button interface makes setup and operation effortless, while the large, clear display ensures you can easily read all dive data even with gloves or in low light. Compatible with air and Nitrox (2199% O), the Puck Pro offers full functionality for recreational and