Operating system Android Wear Memory storage capacity 4000 MB Special features Sleep Monitor, Blood Oxygen Monitor Connectivity technology Bluetooth Wireless communication standard Bluetooth About this item LARGE DISPLAY : 1.6" AMOLED display providing a clear viewing area for easy interaction. LONG LASTING BATTERY : Charges up to 65% in 30 minutes and lasts up to 13 days at a full charge. ALL DAY TRACKING : Tracking over 100 workouts and monitoring sleep patterns for sleep insights. GALAXY CONNECTED EXPERIENCE : Taking photos, playing songs, checking texts and calls right from the wrist.