The PC 121 is an over the ear monaural headset, ideal for inexpensive Internet telephony and laptop use.¤¤PRODUCT FEATURES:¤¤Robust microphone for high speech intelligibility;¤¤Adjustable microphone position and ear clip;¤¤Wearable over-ear left or right;¤¤Internet telephony compatible;¤¤Voice recognition;¤¤Unique "ear clip design";¤¤In-line volume control and microphone mute switch.