new soft warm beanies hat wireless bluetooth smart caps headset headphone speaker mic w04, Blue;gray

frequency: 2.4026ghz-2.480ghz transmission distance: 30 ft or so transmission distance of mic: 3 ft li-ion battery:3.7v/120ma charging time:2.5 hrs standby time:60 hrs continuous working time: about 5hrs bluetooth name:magic hat size:fits for head circumference 56-62cm speakers can be taken off so that you can wash the hat quantity:1pc color: deep grey,light grey,beige,black,black+grey,white+blue,red+coffee,grey,blue+grey,watermelon red,watermelon red+blue,blue.