Noise-cancelling microphone filters out unwanted background noise.

Power switch illuminates when microphone is active.

Advanced digital USB provides superior clarity with the simplicity of a single USB plug and play connection.

Can be used with any computers with USB port, plug and play; automatically shielded built-in sound card microphone of computer ( certain computer will not shield which only manually switch once. 

Specifications:

Working voltage: 4.5V
Size: 2cm x 2cm x 0.5cm 
Color: Black