stardrift Bluetooth 4.0 Smart Wristband Sports Bracelet with Pedometer Sleep Monitor Activity Tracker with Touch Button Compatible for iPhone 6s 6 6 plus 5s and Android 4.3 above Waterproof (black) Accurately track your all-day status like steps taken, distance traveled, calories burned, exercise time and sleep quality Check recently 15 days daily datas in your smartphone connected with this wristband via bluetooth.You can also check intraday datas in the 0.49 inch bright OLED display screen of the wristband IP64 waterproof stand,can meet your daily demand;The watchband made of medical TPU material,very healthy Support vibrate reminder sync mobile such as calls, whatapp, skype, twitter,facebook, WeChat,SMGS,QQ Sensitive touch button,easy to switch and check the datas on the screen