King Wear KW99 Bluetooth Android Smart Watch Specifications; 3G WCDMA 850/2100; 2G GSM 850/900/1800/1900 quad-bands; Display:1.39 inch AMOLED whole round HD;resolution:400*400 pixel; OS: Android 5.1 MTK6580 Quad core 1.3Ghz, 5GB +512MB; Bluetooth:Ver 4.0, compatible for both IOS and Android; SIM card:Yes,Nano SIM Card (not support TF card) Music format:MP3,WMA,FLAC; Pictures format: JPG,PNG,GIF Battery: 400mAh High Power Polymer battery, pogo pin...