(Refurbished) The most rugged and capable Apple Watch ever, designed for exploration, adventure, and endurance. With a 49mm aerospace-grade titanium case and advanced features for fitness tracking and communication, it's built for the toughest challenges. Features include a high-resolution OLED display with excellent brightness, robust water and dust resistance (IP6X), and a long battery life of up to 36 hours. It also offers advanced health monitoring, fall and crash detection, built-in GPS, cellular connectivity, and a range of sensors for a comprehensive activity tracking experience. The operating system is watchOS 9, and it is compatible with iOS. The watch case is made of titanium and measures 49mm in size.