Fitness Activity and Sleep Tracker Wireless Wristband, Black, Large Accurately track stats on activities done throughout the day like calories burned, distance traveled, steps taken, and active minutes Monitors how long and how well you sleep and wakes you (not your partner) with a silent wake alarm It has a bright 0.49 inch OLED screen that makes it clear when viewing your daily stats, exercise mode, and time of day Comes with picture detailed pdf manual upon purchase. Much better than fine print manuals. Easily syncs with your android 4.3 and above, and ios 7.0 and above. Receive notifications on incoming calls, sms alarms, and email reminders device