These KHM Brand AK-107 stereo earphones are specifically designed for the iPhone. They deliver PREMIUM Sound and Hi-fi Stereo audio quality through 10mm drivers, covering a wide frequency range of 20Hz-20KHz. Key features include Tangle-Free convenience, high sensitivity (98dB), a standard 16 ohms impedance, and a comfortable 1.2m cord length. The integrated in Line Controls allow for easy management of music and calls.