MHD IP670 Universal In-ear heavy bass headphone for MP3 Phone  Features: Can connect to two devices at the same time. Adjust volume and switch songs freely. Complete aluminum sound cavity. Advanced DSP for high quality sound. Built-in microphone、 volume control、 next\/previous song switching. Specifications:          General Specification             Brand Name       MDH             Model Model        IP670             Color        Blue、White             Cable Length        1.2m             Wearing Type        In-ear           Technical Parameters            Wired Control         Yes             Driver Unit        3.5mm             Receive Sensitivity        116dB±2dB             Impedance        32Ω             Frequency Response        20-20kHz    Package  Included:                   1 X JBM-A8 Earphone