Sennheiser PC121 In-Ear Monaural Headset

The Professional PC121 Headset is an ultra-light, one-sided headset ideal for IP-based communications, especially when traveling. Use it for inexpensive telephone-conferences or private calls, dictation or entertainment. Ideal for inexpensive Internet telephony Self-adjustable, Omni-directional Microphone for clear communication, more comfort and flexibility In-ear wearing style for those who prefer the most direct sound In-line volume control and microphone Mute Switch lets you decide volume intensity and allows you to remove someone from a three-way conversation Compatible with almost any sound card, it can be used for listening to Music or films on your laptop or with CD/DVD/MP3 players Single-sided cable keeps chin and neck free so you can concentrate on your game Headphones Frequency Response: 45 - 18, 000 Hz Impedance: 32-ohms SPL (at 1 KHz, 1 Vrms): 113 dB Microphone Frequency Response: 80 Hz - 15, 000 Hz Sensitivity: 38 dBV/Pa Impedance: 2k-ohms