?Compatible and Firmware Update? It is compatible with Android 4.4 & IOS 8.0 above phones, supported with Bluetooth 4.0.This bracelet is download " Hero Band" App from Apple Store or Google Play.Enter into "Home" page?Device?click"Firmware update"to update.(If the firmware is latest,there is not the red spot.) ?Health Detection Bracelet Band?4 main functions (blood oxygen detection, heart rate detection, blood pressure detection, fatigue detection) monitor your body healthy, help you to know the condition of yourself more clearly.And other function Call/SMS reminder,SNS push,sport track,sleep monitor, remote camera etc...This fitness bracelet also be a best choice for Valentine's Day Gift for girlfriend/boyfriend husband/wife. ?Heart Rate and Sleeping Monitor?The activity bracelet can monitor your heart rate to help you do exercise scientifically, and monitor your sleep from 21:00pm to the 10:00am next day, and APP will track your sleeping time, and analyze sleeping quality with cartography special vibration alarm to wake you up without disturbing other people.(NOTE:All of detect data can not guarrantee 100% accurate, which is only for reference, can not be medical use!!!) ?Life Waterproof IP67?This wristband's waterproof function can meet the requirement of life waterproof,such as washing face or hand.Prevent sweat and rainwater from entering,suitable for both indoor and outdoor activities.(NOTE:Do not recommend swimming or diving for a very long time wear bracelet,keep under 1 meter water 30minutes.Do not touch warm water or hot water.) ?Turn On and Fast Charge?First time use,Long press the touch key below the screen to turn on bracelet.If the screen can not be turn on,charge it for 1-2hours,then try to re-start it up.Charge method--?.Find the charging touch spots at the back of the bracelet;?.Make the pins of clip charger aim at the touch spots and clamp the bracelet tightly,USB and plug into computer USB port to charge.(NOTE:The charger must clampe the bracelet tightly,otherwise you may fail to charge.)