Bluetooth Earbud, Mixca&reg; Mono Smallest In ear Wireless Handsfree Stereo Headphone Mini Earphone with Microphone for iPhone Samsung LG iPad and more IOS Android SmartPhones and Tablets Pc (Khaki ) 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. Bluetooth version:V4.0 + EDR Transmission range:10 m Multi-point connections can be connected to two one with two Bluetooth devices simultaneously