Stellar condition, used very sparingly! Size 40mm Aluminum Comes form a smoke and let free environment Stainless Steel Mesh Loop w/ Magnetic Clasp band added Features GPS, GLONASS, Galileo, and QZSS Barometric altimeter Water resistant 50 meters1 Electrical heart sensor Optical heart sensor Improved accelerometer up to 32 g-forces Improved gyroscope Ambient light sensor Speaker 50 percent louder Microphone Apple Pay Capacity 16GB Ceramic and sapphire crystal back