Finejo Laptop/pc Headphone Headset Earphone with Mic Microphone for Skype MSN Headphone volume is adjustable. Headphone is retractable. Sensitivity: 105dB S.P.L at 1KHz. Frequency: 20Hz~20kHz. Headphone Impedance: 32 Ohm. Plug: 3.5mm stereo.Low power consumption, plug and play, no driver required. Ideal for online chat, gaming, voice-over-internet. Voice recognition or simply listen to music. Also compatible with audio devices like MP3/ CD/ Walkman, to be used as earphones. Package Content:1 x Headphone Mic Microphone For PC Laptop.