T55 Plus Smartwatch Fitness Band One of the Most Advanced Fitness Smart Watches, Cheap and Lightweight. Equipped with wireless you can Just Charge It Fully As Fast As In 2 Hours, And Continue Long, Just Do A Lot Of Intentional Things By Attaching It To Bluetooth Phone, Check Blood Pressure, Heart Rate With The Monitor, Shows Your Steps. Walk.Product DetailsMaximum Operating Altitude 4000 mClosure Metal ClaspSensor Heart rate monitor, Countdown, PassometerCompatible Device All Andriod, Apple Mobiles, Xiaomi , Samsung, All SmartphonesTalk time 4 hrBattery Type Lithium PolymerBattery Life 1 YearRechargeable Battery YesCharger Type USB Direct Charge 2.0Stand By Time 24 hr