... 1).Chipset:CSR BC6 V2.1 2).Support:Headset,Headfree,Noise-Canceling,Voice-Dial/Mute Bluetooth headsetheadsetbluetooth earphoneSpecification:BH-M11 is the ... enjoy your work! Features:1). Blocks 4 times the external noise.2). 2 IN 1 function, BT headset and wired headset ... enjoy your work! Features: 1). Blocks 4 times the external noise 2). Crystal clear sound with DSP3). Support A2DP,AVRCP,headset ...