Fast shipping +Free tracking number, 3.5mm jack Ear Hook Headphone with Microphone for PC Laptop A must have tool for VoIP Skype, MSN, Yahoo, ICQ or internet calling, entertainment from the e-communication Also fit for all audio devices with 3.5mm jack, to be used as earphone . Multimedia headset with micro . Cable length: Approx. 2m Microphone: Frequence range: 50 to 16kHz Impedance: 2.2k ohmSensibility: -38db  4db Earpiece: Frequency response: 50 to 15kHz Sensibility: 108dB  3db Package Includes: 1 x PC Computer Laptop Headset Headphone Microphone Mic