THE SENTINEL™ | Technical Modcase for Apple Watch Ultra The Sentinel™ is an operational tool engineered to provide a tactical upgrade for the Apple Watch Ultra. By combining elite impact protection with full functional transparency, it transforms your device into a mission-ready piece of hardware. The Specifications Chassis Structure: A high-density, shock-absorbing frame precision-molded from a rugged, lightweight polymer composite. The architecture is designed to deflect and disperse kinetic energy away from your Apple Watch during high-velocity impacts. Tactical Strap: Integrated all-terrain strap crafted from a high-performance, reinforced polymer. This skin-friendly material is engineered for extreme flexibility, sweat resistance, and maximum comfort during high-intensity activity. Secure Locking System: Four marine-grade stainless steel screws create a rock-solid connection, ensuring The Sentinel™ becomes a seamless extension of your watch. Zero wobble, zero compromise. Functional Integrity: Designed with uncompromising access to all critical features. The Digital Crown, sensors, ECG, and signal strength remain 100% unobstructed, ensuring your tech works exactly as intended under any condition. Why ALPHA Technical Gear? While standard accessories focus on aesthetics, ALPHA focuses on performance. The Sentinel™ is not just a case - it is a protective module field-tested for those who demand reliability from their gear, from high-elevation backcountry trails to the daily urban battle Compatibility:Apple Watch Ultra 49mm: Fits Ultra 3, Ultra 2, Ultra 1 Apple Watch Series 46mm / 42mm: Fits Series 11, Series 10 45mm / 41mm: Fits Series 9, Series 8, Series 7 44mm / 40mm: Fits SE (All Gens), Series 6, Series 5, Series 4 *Unsure of your size? The case size is engraved on the back of your Apple Watch In the Box The Sentinel™ Modcase with Integrated Strap The Alpha Precision Tool for installation Set of 4 locking screws (plus two spares) Built to move. Designed to lead.