For better sound, record 6 to 12 inches away from microphone. Do not use this product in close proximity to a loud audio source, such as a speaker. 0- to 90-degree adjustable angle for precise placement; 3.5mm TRRS output; plugs into a smartphone’s 3.5mm audio jack; no battery or software required. Electret condenser; frequency range: 100Hz - 18kHz; sensitivity: -25dB±3dB(0dB=1V/Pa 1kHz); equivalent noise level: >60dB @ 1kHz. Unidirectional polar pattern focuses on audio in front of a smartphone’s camera and minimizes sounds from the sides and back. Condenser microphone for achieving better audio quality when recording everyday videos on a smartphone.