Recommended reason 24 hours PER sec sustained heart rate monitoring--UPGRADED fitness tracker can support 24 hours per second to monitor your heart rate, different from the past monitoring per hour; Monitoring your heart rate to help you do exercise scientifically and help you get a better understanding of your fitness level. IP68 waterproof grade--This smart band can be used for washing, showering, swimming, and even diving underwater 60 meters; You do not need to take it off while doing these activities. Sleep monitor--Synchronize your sleep time every night and analyze your sleep quality by the sleep trend graphs; Accurately monitor total effective sleeping time and motions every night, you can better understand your sleeping quality. Multi functions --Pedometer, Calories, Distance, Heart Rate Monitor, Sleep quality measurement, Call reminder, Alarm clock, Search bracelet and so on, these amazing features are available, do not hesitate; App is more comprehensive, now it is updated version. Besides, it is with high quality comfortable and fashion strap. Wide compatibility & Long-lasting battery--Full charge requires only 1-2 hours and the standby time can be up to 5-8 days with full power. App supports most smart phones with Bluetooth 4.0 or above. Support system: iOS 8.4 or above. Main Features: - Bluetooth Synchronization With Bluetooth 4.0, this smart bracelet is available for smartphones with Bluetooth function - Professional Heart Rate Detection Whether you are resting or doing sports, detect your heart rate accurately - Intelligent Anti-lost Watch will send an alarm after leaving the mobile phone in a certain distance, no need to worry about losing your phone - Remote Camera Control your smartphone to take photos, catching every moment you want - Sport Monitor This smart bracelet can record steps, calories and distance, so you can know your sports data, adjust your exercise program and live a healthier life - Sleep Monitor Accurately monitor total effective sleeping time and motion time every night, helping you develop good living habits - Sedentary Reminder Develop scientific habits and effectively resist sub-health - APP supports languages: English, Japanese, Simplified Chinese, Traditional Chinese, French, German, Russian, Romanian - The watch not supports languages: Arabic, Thai Function : MAIN FUNCTION-Blood pressure blood oxygen monitor heart rate monitoring, pedometer, calories record, sleep quality monitoring, sync date and time, notifications, anti-lost alert, find Phone, sedentary alert, etc. Lightweight 20g quite convenient even wear it sleeping.Responsive OLED Touch Screen - by short touch/long touch 5 seconds of the only key,you can easily read the steps counting, heart rate, calories, time, date, messages, etc. Key Specifications - Bluetooth 4.0. Supports IOS 7.1 or above ( i Phone 4S, 5/5S/5C, 6/6S plus, 7/7S plus,etc.); Android 4.4 or above (Download APP from Apple Store or Google Play. Smart phone only, not for PC or Tablet). High quality polymer rechargeable battery guarantees long battery life: about 7-10 days standby time/4 days operating time.Package Includes: Smart Bracelet * 1, Multi Language User's Manual *1, Charging cable *1 Bracelet language-- Sync with your phone language OR English.Lightweisght and breathable design ,makes your life healthy and fashional,IP67 splash-proof and sweat-proof but no shower no diving with it.Stable and shackproof,you can claim for return in 6 month if there is any quality issue. Packing list: packing box*1, bracelet *1, charging clamp *1, manual,*1 How to use : 1. Make your fittness tracker Power on (How to power on it ? Please long-press botton 3-5 set) 2.Open your Phone bluetooth , conntected bluetooth "K1***" 3.Downlod APP , Please search "Wearfit 2" in your APP store and android market . and then downlod it 4.open to "wearfit app" , click "Mine" 5.Click "personal data " , fill in your information 6.Click "Device management" , and then click "connection management" , connected your smart bracelet, this smart bracelet ID code is C1***, and then then you can setting you want funtion 7.Start using