Battery Capacity(Mah):180<br>Screen Size(Inches):1.83<br>Model:TB40<br>Supported Operating System:iOS,Android<br>Strap Material:Silicone<br>Watch Case Diameter:4.2cm<br>Watch Connectivity:Bluetooth<br>Watch Features:Notifications,Phone Call,Clock Display<br>Region Of Origin:China<br>Batteries Included:Yes<br>Watch Face:Digital<br>Manufacturer:Dongguan Langchen Technology Co.. Ltd.<br>Power (W):0-49 W<br>Case Material:Alloy<br>Movement Type:Quartz<br>Water Resistance Level:Non - Waterproof<br>Contains Batteries Or Cells?:Cells<br>How Batteries Are Packed:Batteries Built-In<br>Battery Or Cell Weight In Grams:3.4<br>Dangerous Goods Or Hazardous Materials:No<br>Number Of Batteries Or Cells:1<br>Battery Or Cell Capacity In Wh:0.66<br>Battery Or Cell Capacity In Grams:1<br>Manufacturer Address:Shenzhen<br>Dg Battery Type:Lithium Lon