Compatibility: android 5.0 (l os) or higher, 1.5gb ram or more - ios: 9.0 or higher, iphone 5 and new models.(smartphone compatibility and function availability may vary according to region, network p more→rovider and device.)operating system: tizen based wearable os 5.5memory (ram + storage): 1gb + 8gbconnectivity: 2.4ghz wi-fi 802.11 b/g/n, nfc, gps/glonass/beidou/galileobattery: 247mah (+43hours)processor: exynos 9110 / 1.15ghz ca53 64-bit dual-coredurability: 5atm + ip68 / mil-std-810gsensors: optical heart rate sensor (8pd), electrocardiogram (ecg), accelerometer (up to 32g), gyroscope, barometer, ambient lighthealth features: sleep, blood pressure, heart rhythm (ecg), atrial fibrillation