Product DescriptionBrand:U-SEE3D Size:74*17.8*8.8mm(just as image show)Color:Red,Blue,Black,our default is Black colorWaterproof:yesPedometer:yesCalorie counter:yesApplication:drive,sports,shopping,business,fashion......Compatible with:Samsung,iPhone,Sonly.Oppo,HTC,Huawei,Xiaomi......Bluetooth:bluetooth 1.1,1.2,2.0,2.1,3.0,4.0Wifi..