Battery capacity: 380mAh Bluetooth version: Bluetooth 5.2 Charging method: Wireless charging Waterproof rating: IP68  (splash resistant, swimming with the watch is not recommended) System: Android version 5.0 or newer, iOS version 10.0 or newer Resolution: 385x420 Features: Heart rate monitoring, blood pressure monitoring, blood oxygen level monitoring Step counting, distance traveled, calories burned Sleep monitoring (sleep duration, sleep quality) NFC, automatic/manual time adjustment, voice assistant, location sharing, offline Alipay, QR code scanning Smart split screen, standby screen time setting, 3D dynamic numbers, code scanning pairing, language change Password screen lock, time, music Breathing exercises, hourly measurement, raise wrist to light screen, fatigue analysis Message notifications, calculator, sedentary reminder, alarm reminder, stopwatch Watch comes packaged with Alpine Loop Orange strap. Note: The strap may slightly differ from the strap shown in the image (buckle type).