... 2). 2 IN 1 function, BT headset and wired headset combination of two functions.3). Support Headset,handfree profile.5). Redial the last ... adjustable.6). Faster connecting,clear sound,anti-interference.7). Lightweight headset design.8). Listen to stereo music from PC.9). On ... noise 2). Crystal clear sound with DSP3). Support A2DP,AVRCP,headset,handfree profile 5). Redial the last call ,Reject call.Volume ...