About Product 1. CPU: JL7013A6 2. Bluetooth Version: BLE 5.3 3. Battery capacity: 650mAh 4. Bracelet memory:RAM: 578KB, ROM: 128MB 5. Standby time: About 60 days 6. Working time: About 7-10 days 7. Charging method: Magnetic charging 8. APP: DAFIT 9. APP supports languages: Arabic, Bulgaria, Czech Republic, Denmark, Germany, Spain, Finland, France, India, Croatia, Indonesia, Italy, Japanese, South Korea, Norway, Netherlands, Poland, Pashto, Portugal, Russian, Sweden, Thailand, Ukraine, Vietnam, Simplified Chinese, English, Traditional Chinese 27 languages 10.Watch supports languages: English, German, French, Italian, Greek Latin, Spanish, Portuguese, Romanian language, Polish language Russian, Ukrainian language, Rusyn language, Belarusian language, Bulgarian language, Serbian language, Macedonian language, Croatian language, Bosnian language, Thai, Hindi, Sanskrit, Nepali language, Cambodian, Vietnamese language, Lao language, Persian language, Kurdish languages, Pashto, Punjabi language, Turkic, Berber, Malay language, Turkish language 11. System requirements: android4.4 or above ios9.0 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. AI voice assistant, bluetooth call making function, calculator function,altitude pressure compass,flashlight 5. Brightness adjustment, wrist turning on screen, weather forecast, music control, alarm clock, search phone 6. Drink water reminder, remote photography, female menstrual reminder, heart rate warning, reminder for long sitting, reject incoming calls 7. Message push reminder:QQ, Mail, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, Line, Kakao Talk, Viber, Skype, Telegram