Bluetooth: BT5.3 Waterproof: IP68 Phone Call: Bluetooth Call Available Colors: Black, Gray, Orange Screen Size: 1.43'' AMOLED Full Touch Screen, 466*466 Resolution Touch Screen: Yes NFC: Yes Battery: 400mAh polymer lithium battery, use time up to 12 days Heart Rate: Yes, real-time dynamic heart rate monitoring with a green light sensor Sleep Monitor: Yes, sleep quality analysis Pedometer: Yes, steps, distance, and calories burning Sports Mode: running, walking, badminton, tennis, basketball, table tennis, cycling, yoga, skipping rope, climbing, indoor running, Elliptical machines, rowing machines, slacker bikes, stationary bikes, baseball, rugby, cricket, strength training Remote Control: BT music & BT camera Compatibility: Android 8.0 or above/IOS 12or above Languages: English, German, Russian, Spanish, Portuguese, French, Arabic, Italian, Czech, Greek, Vietnamese, Slovensko, Romania, Turkish, Traditional Chinese.