Chromo Inc Cavalcade-of-Color 10 Pack of Ultra-Glide Mini-Styli - Black, Red, Silver, Blue, Chrome, Pink, Green, Purple, Gold and White Stylus HEART RATE MONITOR & BUILT-IN GPS & SEDENTARY ALERT 24-hour automatic monitor your heart rate data with photoplethysmography principle& heart rate monitoringalgorithm. Get real-time data on watch,heart rate curve on app to help you better understand your health. Built-in GPS track your workout routes .When you sedentary, It reminds you for a break. SLEEP MONITOR & VIBRATION CLOCK Automatically tracks your sleep duration, sleep stages. The fitness tracker will analysis sleep quality data with deep sleep,light sleep &awake time via heart rate monitoring. Your sweekly&monthly sleep quality is analyzed by sleep trend chart.The silent vibration clock alarm wakes you up without disturb other. CALL & MESSAGE NOTIFICATION You will get instant messages & call notification on fitness tracker after it connected to your smartphone APP, Notification including call,SMS & social app message: Facebook,Twitter,Snapchat,WhatsApp,Instagram,Linkedin,etc. 14 SMART FUNCTIONS & IP67 WATERPROOF Time display,Remote Control Phone Camera,Clock Alarm,Anti-lost Vibrate,Pedometer Step Counter,Distance Counter,Calories Burned Monitor,Find Wrist Sense,Sports Target Setting,Battery indication. Waterproof IP67,Anti-rain,Waterproof Splash,Sweat Proof,etc. MULTI COMPATIBILITY & LONG-LASTING BATTERY & BUILT IN USB PLUG &ONE FREE REPLACEMENT WRISTBANDApp supports Bluetooth 4.0 & above; IOS 7.1 & above; Android 4.4 & above. With 3D acceleration sensor, More accurate . 1-1.5hours Charge,standby:7-10 days. Built-in USB plug: easy charge no need charging cable.To avoid the overloaded current,Please use your mobile charge adaptor to charge, not charge directly with your computer.One pair blue replaceable wristband for you.