Overall size: diameter 40.0mm, thickness 10.6mmPCBA stack size: 26*27*0.6 mmHardware Specifications Main Chip: NRF52832_QFAAMemory size: 512KB+64KBG-sensor model number: KX1025Heart rate sensor model: HY1303Display specifications: 1.0 inch TFT LCD color screen resolution 128*96Button mode: single touch panelType of battery : Lithium polymer batteryCharging head specifications: Charging 1A or lessCharging method: pin modeMotor type: flat motor 0820Other parameters Standby power consumption: standby for 150 days, normal use for 6 days (calculated with 170mAh battery)Bluetooth type: Bluetooth 4.0Font Push Type: Multi-language fontSupport APP: Hey BandCharging voltage: 5.0VCharging current: 85MAAPP language: Simplified Chinese, Traditional Chinese, English, Japanese, Korean, Spanish, German, Italian, French, Greek, Turkish, Russian, Dutch, PortugueseMobile phone system requirements: Support system for iPhone 4S / 5 / 5S / 5C / 6 / 6 Plus / 6s / 6s plus / SE / 7 / 7 plus iOS 8.0 and above; compatible system for Android 4.4 and above, and support Bluetooth 4.0 Android smartphoneFunction Motion Record: Step, exercise time, exercise mileage, calorie consumption, sleep monitoring, save 30 days of exercise/sleep dataHealth monitoring: real-time heart rate measurement (dynamic, static, heart rate +), blood pressure measurement (can set timing blood pressure measurement), blood oxygen measurement, fatigue monitoringSmart Reminder: Custom alarm reminder, drinking reminder, sedentary reminder, call reminder, information push (SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/WhatsApp), anti-lost reminderOther functions: Turn the wrist bright screen, one-button physical examination, time display, remote photography, do not disturb mode setting, find bracelet, WeChat sports, custom home style, bracelet rejection call, support APP air upgrade, personalized settings