System on a chip: Apple Series 1 watch-- Work with iPhone 5 or later, not compatible with Android phone-- Storage: 8 GB; Battery: 246mAh-- Initial operating system: watchOS 1.0-- Display: 42 mm: 24.34 30.42 mm; 38.96 mm (1.534 in) diagonally, 312390 pixels, 326 PPI--