The iPhone 12 Pro Max display has rounded corners that follow a beautiful curved design, and these corners are within a standard rectangle. When measured as a standard rectangular shape, the screen is 6.68 inches diagonally (actual viewable area is less).
Rated IP68 (maximum depth of 6 metres for up to 30 minutes) under IEC standard 60529
Video playback: Up to 17 hours
Video playback (streamed): Up to 11 hours
Audio playback: Up to 65 hours
Video playback: Up to 20 hours
Video playback (streamed): Up to 12 hours
Audio playback: Up to 80 hours