product overview:TWS bluetooth,charging case with battery, can charge the headphone directly,operating range: 10m(no barriers),control,previous/next song,play/pause,talk/ end call,Silicon microphone:-42±3DB;spk:7MM neodymium spk;housing:injection housing;surface treatment:1C pad printing logo(2pcs) ;bluetooth solution/PCBA:NY015(Bluetrum)/5.0(playtime:4H);battery:2*50MAH rechargeable battery(charging time:2H);labor and other materials:labor and other materials;charging stand housing:charging stand housing;charging stand battery:320MAH rechargeable battery(charging 2times);:charging stand housing ;silicon cap:three pairs of silicon caps ;silicon rubber ear wings:one pairs of silicon rubber ear wings;charging cable:0.3Mmirco usb charging cable;packaging:in gift box pkg,4C printing ,matt finish,inner tray,transparent stickers manual 40PCS/carton insulating film;