Teslasz Fitness Trackers, I5 plus IP65 Water-resistant Pedometer Bluetooth 4.0 Sleep Monitor Activity Tracker for Android and IOS Smart Phone OLED Display: 0.91 inch OLED screen allow you to check time, date, steps, calories, working distance, message, caller ID freely. IP65 water resistant grade: You cann't wear I5 plus bracelet to swim, it won't missed any important message or calls; Ultra-light weight; Super thin (8.6mm); Adjustable snap strap design to fit your wrist. Sync sport data with apple and android device: Go to App store or paly store, download this APK: "Zeroner"and install it. Compatibility-iOS system: Must be iOS 7.0 or later,Such as: iPhone 4S /5/6, iPod touch 5, etc.Android system: Must be Android 4.3 or higher, Bluetooth 4.0; Such as: Samsung S4, Note 3,etc. Lithium ion polymer battery: 75mAH, Standby time: 4~5 days Two control mode: Touch Screen control, Gesture control USB design for charging, PC Machine, TPU strap Call Notification: show caller ID when receive a call SMS Notification: show contacts and content of SMS of your smart phone