Pedometer function: 24-hour step counting, all-day monitoring of steps, calories, distance Stopwatch: With stopwatch function, perfect for daily training, time management, and improve efficiency Alarm reminder: 8 sets of alarms can be set, and vibration reminders can be used when the time is up Countdown: With a countdown function, grasp progress, cycle reminder Vibration reminder: Vibration reminder can be used when the time is up, and music reminders can also be customized Sleep monitoring: With sleep quality monitoring function, sleep quality level is clear at a glance Raise your hand to light up the screen: When the function is turned on, the screen will light up with a raise of your wrist Specifications: Strap size: 248*18*10mm Display: LED seven-segment display Battery life: charge and discharge times>300 times Battery capacity: 50mAh Standby time: 20 days Charging method: Micro USB Power supply voltage: DC=4.5V-5.5V Sleep current: 60uA Strap material: TPU