Product description This mini wireless Bluetooth headset has more stable signal transmission with Bluetooth 4.0 technology, up to approx. 6 meters transmission distance; 10 meters in open and spacious space. Clear and Crystal Voice This headset owns better echo cancellation, noise suppression and stable signal. You can enjoy your conversation and music without disturbing. Connect Two Devices at the Same Time: Pair it with two Bluetooth-enabled devices at the same time and don't miss your calls when you have two cell phones. Last Number Redialed/Play or Pause Music Just double press the multifunctional button(MFB), voice prompt "Last Number Redialed". Short press the MFB to play and pause music. Support Volume Control/Next song Short press the side button to control the volume, long press the side button to skip to next song.