W17 Pro Max 1.9 inch Bluetooth Call Message Reminder Silicone Smart Watch Major functions: 1.9-inch high-definition large-screen display, Bluetooth calling, support for payment code collection, 2 games (Snake and Airplane Wars), noise detection, breathing training, button number and caller number, support for English number reporting, adjustable call volume and music volume, password lock, hand raise to brighten screen, dial pad, contacts, call records, information, sports modes (walking, cycling, running, mountain climbing, indoor running), step tracking, sleep reminder, sedentary reminder, heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, Bluetooth photo control, Bluetooth music control, find mobile phone, weather, drink water reminder, stopwatch, calculator, calendar, alarm clock, settings (time setting, profile, do not disturb, ring only, vibrate only, vibrate and ring, brightness, language settings, password lock, sidebar, factory reset, about this device), 6 UI menu styles (Gypsophila, list, WP, block list, gear), SIRI (double-tap to wake), find mobile phone, APP QR code, flashlight Chip: YC1137 APP: Hi Watch Plus Compatible systems: Android 5.0 or above, iOS 9.0 or above Flash memory: 128 MB + 64 MB Screen size: 1.9-inch IPS high-definition screen Touch type: HD full touch screen Bluetooth: 5.0 + 5.0 dual mode Gravity sensor: SC7A20 Battery type: Lithium polymer battery, capacity: 3.7V 200mAh Charging method: Magnetic charging Mobile app languages: English, Dutch, Russian, French, German, Portuguese, Spanish, Turkish, Japanese, Polish, Arabic, Malaysian, Thai, Czech, Slovak, Philippine, Indonesian, Ukrainian, Vietnamese, Italian, India Band language options: English, French, Spanish, Portuguese, Russian, German, Dutch, Turkish, Malaysian, Polish, Czech, Slovak, Arabic, Italian, Thai Charging time: 1.5 hours Battery life: 15 days Wristband size: Overall length