... quality Universal 3.5 Jack: compatible with all stereo headphone Voice Alert: A built-in voice alert that reminds ... , call rejected, last number redial, low power VoIP- Supports Bluetooth enabled computers for VoIP calling, such as Skype Multifunctional smooth ... light weight at only 12 grams , 4,Reversible ear hook, wear on either ear 5,Noise reduction microphone, Excellent sound performance , 6 ...