Though in small， lightweight size， the W2 USB Multi-functional 3D Pedometer Smart Sports Bracelet integrates a variety of brilliant features. Built with highly sensitive 3D acceleration sensor， it keeps track of your daily activities and calculates your calories burned with ease. And it can display time， date， and even environment temperature. Sleep monitor helps you know about your own sleep patterns. This smart bracelet has a comfortableTPU band that fits wrists of different sizes. USB charging and data sync add more convenience. You got to give it a try!                                    Features            Built with highly sensitive 3D acceleration sensorKeep track of your daily activities and calculate your calories burnedGive a clear view of the accomplishment of your preset sports goalDisplay time， date， and environment temperatureSleep monitor helps you know about your own sleep patternsComfortable TPU band fits wrists of different sizesUSB port is integrated into the wrist band， plug-and-play designSupport USB charging and data syncSmall， lightweight size， sleek design                                                            Specifications            Model    W2    <br>Material    TPU !#!amp!*! PC    <br>Color    Black    <br>Display    LED Display    <br>Accuracy of Step Count    ±5%    <br>Tolerance of Time    Tolerance for 24H    <br>Steps Number    0~999 Steps    <br>Battery Life    Time of Charge and Discharge!#!gt!*!300Times    <br>Power Supply Voltage    DC=5V 10 Working Temperature: 0~45℃    <br>Dimensions    (2.95 x 2.83 x 0.87)" / (7.5 x 7.2 x 2.2)cm (L x W x H)    <br>Weight    0.99oz / 28g    <br>                                                            Package Includes            1 x W2 Intelligent Motion Bracelet1 x User Manual