This is an omnidirectional, monaural microphone. It uses a plug-in power system, so no power is needed on the microphone side. It features a rotatable clip that makes it easy to attach to a tie or pocket. Product Specifications: Polar Pattern: Omnidirectional Frequency Response: 30～15,000Hz Sensitivity (0dB＝1V/Pa): -48dB Cord: 0.9m straight-out L-shaped monaural mini-plug Dimensions (W x H x D/mm): 33x12x13 Weight: Approximately 6g (excluding battery and cord)