NX23 Pro 1.27 inch Color Screen Smart Watch, Support Bluetooth Call Heart Rate Monitoring About Product 1. CPU:RTL8763EWE 2. Bluetooth Version: BLE 5.2 3. Battery capacity: 200mAh 4. Bracelet memory:Flash:128MB 5. Standby time: About 25 days 6. Working time:About 5 days 7. Charging method: Magnetic charging 8. APP: Fitcloudpro 9. APP supports languages: Chinese, English, German, French, Italian, Spanish, Japanese, Polish, Russian, Portuguese, Vietnamese, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Indonesian, Malaysian, Finnish language, Greek, Romanian), the factory default is English 10. Watch supports languages: Chinese, English, German, French, Italian, Spanish, Japanese, Polish, Russian, Portuguese, Vietnamese, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Indonesian, Malaysian, Finnish language, Greek, Romanian), the factory default is English 11. System requirements: android5.0 or above ios10.0 or above Main Function 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Bluetooth call,multiple sport modes,call reminder,SMS reminder,third-party messaging reminder 5. Sedentary reminder,music control,synchronous data to APKAPP 6. Menstrual period reminder,photograph,multilingual push