HD15 1.75 inch Silicone Strap IP68 Waterproof Smart Watch, Support Sedentary Reminder Sleep Monitoring Hardware parameters: 1. APP: FitCloud Pro 2. Main control chip CPU: Bluetrum 8959T6 3. Compatible system: Android 5.0 and above; iOS 10.0 and above 4. Flash memory: RAM: 892KB 5. Head size: 40.2x34.5x9.6mm 6. Screen type: TFT 7. Screen size: 1.75 inches 8. Resolution: 240x296 9. Touch screen ICtype: CST816D Connection parameters: 1. Bluetooth call: Bluetrum BT8959T6 2. Bluetooth: BLE5.3 3. Acceleration sensor: gsensorsSTK8321 4. Heart rate: HX3918 5. Battery type: polymer lithium battery 6. Capacity: 3.8V230mAh-501528 7. Charging method: magnetic charging APP software functions: 1. Sports: step counting, calories, distance, sports mode 2. Health: blood pressure, heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc. Smart reminder: incoming calls, text messages, emails, WeChat, QQ, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, Messenger, Snapchat, Line, Kakao Talk, Viber, Skype, telegram 3. Others: raise your wrist to light up the screen, alarm reminder, remote photo taking, find your phone, etc. Watch hardware functions: 1. Sports data: distance, calories, steps, real-time heart rate, exercise duration 2. Sports mode selection: walking, running, mountaineering, cycling, skipping, basketball, badminton, football, yoga 3. Others: OTA, shortcut bar (control center), data (step counting, distance, calories), heart rate, blood pressure, blood oxygen, sleep, wrist-raising screen, weather, WeChat sports, information, reminders (messages, drinking water, sitting for a long time, alarm clock), womens health, stopwatch, countdown, find phone, find bracelet, shake to take pictures, dial switch, music control, settings (language selection, brightness adjustment, screen on time, vibration setting, factory reset, version information), power onoff logo, components (function editing), password lock, breathing training, exercise, exercise h