DYNAMIC HEART RATE & BLOODY OXYGEN MONITOR: The OPTA Band supports a fully automatic heart rate monitor that keeps track of your vital around the clock. It provides you with valuable information which lets you optimize your upcoming workouts . Note- This data is only for your reference to adjust your exercise and not for medical purposes.\nALL DAY ACTIVITY TRACKER: Whether you're into sports or fitness the OPTA Band will follow you anywhere you go! It features multiple functions in life, especially in its smart monitoring for sports and health. It has 4 built-in sports modes.\nFITNESS & OTHER FEATURES: Additionally, the OPTA Band comes with these features - heart rate,Blood pressure,Blood oxygen, pedometer, calories record, sleep quality monitoring,sync date and time, sms/sns notifications(including Whatsapp,Facebook, twitter, Instagram,we chat etc) sedentary alert etc.\nAPP / PHONE SYNC: When paired with your smartphone through Bluetooth, this fitness tracker provides you with incoming call notifications to make sure you'll never miss out on an important message again. Also, this tracker is compatible with Android 4.4 and Above For iOS 9 and Above. Bluetooth 4.0 BLE.\nMAGNETIC CHARGING & LONG STANDBY TIME: The OPTA Band comes with a thimble plug in charger that needs to be connected to the device (2 point) and needs to be plugged into a USB charging port. Just charge it for 120 minutes and it will provide enough juice for 2-3 days letting you use it through multiple days without needing to worry about running out of power. The battery life and charging cycles depend on the use,situation,settings and many other factors.