Apple Watch Series 3 Smart Watch - Wrist - Barometer, Optical Heart Rate Sensor, Accelerometer, Altimeter, Gyro Sensor - Music Player, Text Messaging - Heart Rate, Sleep QualityDual-core

Built-in GPS, GLONASS, Galileo, and QZSS Capacity 16GB Accelerometer and gyroscope Optical heart sensor S3 with dual-core processor Space Gray aluminum case LTE and UMTS Barometric altimeter W2 Apple wireless chip Ion-X strengthened glass