The W2 USB wristband is a multifunctional and smart device with 3D calorie pedometer， sleep quality monitor， temperature and timer display. It can track your burned calorie， sport steps and distances. Also， it can set up and inquire the sport target and task by connecting computer with USB cable. Besides， this smart wristband supports Microsoft Windows operating system. Made of first-class silicone material， it is lightweight and comfortable to wear. Elegant， compact and practical， this Wearable Smart Wristband with Timer/Temperature/3D Pedometer/Sleep Monitor/Calorie Functions can arouse your passion for sports and make sports more enjoyable.                                    Features             Built-in high sensitivity 3D sensor to catch every tiny movement for more precise counter<br> With temperature display function， enable you to know ambient circumstances<br> With USB interface on the band， plug and play<br> With sports data memory function， you can check data through computer<br> Time / Date display <br> Smart sleep monitoring helps you improve sleep quality<br> Built-in rechargeable battery<br> Compact and lightweight， simple and fashionable <br> Ergonomic design is comfortable to wear<br> With gravity sensor  <br>                                                            Specifications             Supported Operation System     Microsoft Windows    <br> Sensor     Gravity Sensor    <br> Battery Capacity     210 mAh    <br> Charging Time     30 M    <br> Stand-by Time     168 H    <br> Material     Silicone    <br> Weight     0.92oz / 26g    <br> Color     Blue    <br> Dimensions     (10.03 x 0.87 x 0.12)" / (25.5 x 2.2 x 0.3)cm (L x W x H)      <br>                                                             Package Includes            1 x Wristwatch<br>