E25 1.43 inch Color Screen Smart Watch,Support Heart Rate Monitoring Blood Pressure Monitoring About Product 1. Battery capacity: 220mAh 2. Bluetooth version :BLE 4.0+5.0 BT3.0 3. Charging method:magnetic charging 4. Waterproof rating: IP67 waterproof 5. Resolution:454x454 6. System: Android system 4.4 version or above,iOS system 8.0 version or above 7. Chip: RTL876EWE 8. APP name: Tefiti 9. Watch support languages: Chinese, English (Default English), Japanese, German, Spanish, French, Italian, Portuguese, Arabic, Russian, Dutch, Indonesian, Indian, Polish, Turkish, Bengali, Czech, 18 languages Function 1. Bluetooth call,heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Multi-sport modes, GPS track movement,voice assistant, Stopwatch,Weather, smart alarm clock 5. Remind function: sedentary reminder, drink water reminder, phone calls reminding, SMS, Facebook, Twitter, WhatsApp, etc. 6. Raise the hand to light up the screen, light up the screen time, find the mobile phone, find the bracelet 7. Reject the call, shake to take a picture, do not disturb mode (do not disturb time setting, turn off the vibration of the bracelet, turn off the message reminder)