HUAWEI Kirin A1 Self-developed Chip: HUAWEI Watch GT 2 comes with HUAWEI's self-developed wearable chip Kirin A1, and intelligent power saving technology to provide up to 7 days of battery Life. 1.39 Inch (46MM) AMOLED Display with 3D Glass Screen: (Please note: Watch face store is not supported on iOS devices.)Resolution: 454x454 HD. Bluetooth 5.1, 14 days for typical use battery. 5 ATM water-resistant. Please note: Watch face store is not supported on iOS devices. Features of everyday life: (Please note: Watch face store, Music playback control, Cycle tracking, All-day stress monitoring features are not supported on iOS devices.)HUAWEI Watch GT 2 Real-time Heart rate monitoring, TruSleepTM 2.0 sleep tracking and TruRelax pressure monitoring. Supports notifications from SMS, Email, Calendar, and other social media applications. You can also use other features like Time, Alarm, Timer, Stopwatch, flashlight and Find My Phone.