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 comfortable TPU 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 sensor<br> Keep track of your daily activities and calculate your calories burned<br> Give a clear view of the accomplishment of your preset sports goal<br> Display time， date， and environment temperature<br> Sleep monitor helps you know about your own sleep patterns<br> Comfortable TPU band fits wrists of different sizes<br> USB port is integrated into the wrist band， plug-and-play design<br> Support USB charging and data sync<br> Small， lightweight size， sleek design <br>                                                            Specifications             Model     W2    <br> Material     TPU & PC    <br> Color     Blue    <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>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 Bracelet<br>1 x User Manual<br>