Display: 1.5-inch round LTPO 2.0 AMOLED screen (466 × 466 resolution) protected by sapphire glass.Build: Zirconium-based liquid metal case with a nano-crystal ceramic bezel and ceramic back.Water & Dive Resistance: 20 ATM rating plus IP68 and IP69 certification, supporting technical scuba and free diving down to 150 meters.Sonar Communication: Allows text and SOS messaging between two Ultimate 2 watches underwater up to 30 meters apart.Health & Tracking: TruSense system with X-TAP sensor for precise ECG, PPG, and blood oxygen readings.Battery Life: Up to 4.5 days under typical use with an Android device (approx. 3.5 days with an iPhone).Connectivity: Independent eSIM cellular calling, dual-frequency GNSS, and Wi-Fi.