SUPERIOR RELIABILITY - The Apeks XL4 Ocea regulator features an over-balanced diaphragm 1st stage, ensuring consistent performance at all depths, providing peace of mind on every dive. EFFORTLESS BREATHING - Experience reduced breathing effort with the pneumatically balanced 2nd stage, delivering gas smoothly and efficiently for a more comfortable and enjoyable dive. CUSTOMIZABLE PERFORMANCE - Easily adjust the 2nd stage with the dive/pre-dive Venturi switch, minimizing free flow and optimizing breathing resistance to suit your individual diving style. BUILT TO LAST - Crafted with a Trivalent Chrome Plated Lead Free Brass 1st stage and a Bioplastic Techno-Polymer 2nd stage, the XL4 Ocea offers exceptional durability and resistance to corrosion. NITROX COMPATIBLE - Dive with confidence using enriched air mixtures up to 40% O2, thanks to the XL4 Ocea's Nitrox compatibility, expanding your diving possibilities safely and reliably.