Bluetooth Headset, Lookatool Mini Wireless Bluetooth Stereo In-Ear Earphone Headphone Headset Earpiece (Black ) Taiwan and the bluetooth master control chip. Can talk, listening to music. Built-in DSP audio processing system, can be a very good eliminate Noise and echo, to ensure clear communication, and music. 2 in a row, to the telegraph, voice prompt operation. Small and light, stealth design.