General Specifications Brand Apple Model Number Ultra Series Ultra Gender Unisex Display Type Retina OLED Always-On Dial Shape Square Physical Specifications Dial Color Titanium Strap Material Ocean Band (Rubber) Strap Color Yellow Case Material Titanium Case Diameter 49 mm Case Thickness 14.4 mm Water Resistance Depth 100 meters Technical Specifications Movement Type Digital Power Source Rechargeable Battery Battery Life Up to 36 hours Connectivity Bluetooth, Wi-Fi, LTE, GPS Compatible OS iOS Features Alarm Function Yes Stopwatch Yes Timer Yes Calendar Yes Illuminated Display Yes Heart Rate Monitor Yes GPS Precision dual-frequency GPS Fitness Tracking Features Steps, Calories, Advanced Metrics Dimensions and Weight Strap Length Adjustable (Fits 130–200 mm wrists) Strap Width 22 mm Weight (grams) 61.3 grams Additional Information Warranty Period 1 Year Included Accessories Charging Cable, Quick Start Guide Special Features Depth Gauge, EN13319 Certification, Siren