Operating system android wear, watchOS Memory storage capacity 16000 MB Special features heart rate monitor Connectivity technology Bluetooth, Wi-Fi, NFC, GPS, LTE Wireless communication standard Bluetooth About this item GPS route tracking - The all-new Route Workout feature lets you import GPX format workout routes from your smartphone to your watch, syncing your route list. Long lasting battery - Go hard knowing that your watch can keep up, with the biggest battery capacity among our wearable series. Bioactive sensor – The powerful 3-in-1 Samsung BioActive Sensor controls three health sensors effectively, monitors your heart rate and tracks your cardiovascular health to detect unusual heart rates and blood pressure. Sleep tracker - Our improved sleep tracking technology tracks your sleep stages to help you create healthier sleep habits and identify your sleep. Durable smart watch - Now 2x tougher front display thanks to Sapphire crystal. It even looks indestructible with Black Titanium or Gray Titanium body.