... , 2.Built-in 40mm speaker. 4.CE/FCC/BQB 2013bluetooth headphone with microphone for coming Xmas gifts Super stereo effect , Adjustable padded headband ... adjusted to fit your head just right. Additionally the headphone comes with a built-in MIC for you to make Skype calls ... ,Talk time:minimum 6 hours6,Standby time:minimum 180 hours7,Color:black,yellow,red,blue Overview Shenzhen Lambdaled factory