Selling because I'm upgrading. I only used this once as a backup during a seminar recording. I haven't used it since then, and I've purchased a new one, so I'm selling this one. It works perfectly. It's in excellent condition, but please understand that it is a used item before purchasing. Communication/Connection Interface: 2.4GHz, compatible with smartphones and cameras Connector Type: 3.5mm jack, USB port Special Features: Stereo/Mono/Safety Channel Switching, Noise Reduction, Volume Control, Mute Function, One-touch Recording Compatible Devices: Cameras, Smartphones, Tablets, Laptops, Video Cameras Polar Pattern: Omnidirectional Microphone Waveform Rate: Mini S/N Ratio (dB): 70 dB Hardware Platform: Cameras, Smartphones Number of Channels: 2 Frequency Range: 80Hz ~ 20kHz Noise Level: 6 dB COMICA wireless microphone system, with a charging case for convenient storage. - Brand: COMICA - Accessories: Windscreen, USB cable, audio cable - Model: Wireless Microphone System - Charging Function: With charging case - Case: With storage case