- 44mm case (Band fits 145-220mm wrists)
- 977 sq mm display area
- 10.7mm thin
- 64-bit dual-core S4 processor (Up to 2x faster than S3 processor)
- Electrical heart sensor
- Second-generation optical heart sensor
- Fall detection
- Digital Crown with haptic feedback
- Improved accelerometer up to 32 g-forces
- All ceramic and sapphire crystal back