Basic parameters: Bracelet size :57mm*43mm*11.5mm Weight: 65g Wrist strap dimensions: 255mm long, 22mm wide Appearance material: Zinc alloy Waterproof class :IP68 System requirements :Android5.0 and above IOS9.0 and above flash Memory :128 mb Screen size :1.96 "HD screenResolution: 240 * 282 Control mode: full touch screen + encoder + double button charging mode: magnetic charging Software features: Dial market, scan code connection, multiple sets of UI menu, voice call, OTA upgrade, step count, calories, exercise mode, hand light screen, sleep monitoring, call reminder, SMS reminder, sedentary reminder, alarm clock reminder, stopwatch, dial switch, 3D dynamic dial, music playback, breathing training, all point measurement, heart rate, blood pressure, blood oxygen, calculator, custom dialing Dial, light level adjustment, weather, independent alarm clock, Function Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Push Message,24 hour instruction,Heart Rate Tracker,Interactive MusicSoftware language: Chinese, English, Korean, Japanese, German, Spanish, French, Italian, Portuguese, Arabic, Polish, Russian, Indonesian, Turkish, Dutch, Czech, Traditional Chinese, Vietnamese