Best-electric Mini503 Stereo 4.0 Bluetooth Headphone Headset Earphone With Acoustical Control And Connecting To 2 Cell Phones Or Tablets Simutaneously 6 Colors Available (Black) With 4.0 bluetooth function and can connect to 2 cell phones or tablets simutaneously and with acoustical control, 6 colors available. Memory flexible headband, foldable design makes it really mini and portable. Voice answer Bluetooth stereo headphone, offers you quality streaming music enjoy. With built-in microphone as well as volume, play, pause skip, call answer and call reject control buttons. Freedom to exercise, move around and commute without wires to tangle or hold you back.