1Adjustable microphone volume, real-time monitoring of microphone input sound. 2Powered by a single AAA 1.5V dry battery, low power consumption circuit design. 3Low noise circuit design, 16 electronic volume adjustable, provide better use feeling. 4Builtin phone/camera microphone port, compatible with a variety of photography and recording equipment. 53.5mm/0.1in microphone interface, can be connected tightly and firmly, not easy to loose. Item Type: Collar-Clip Mic Material: ABS+Metal Weight: Approx. 143g/5.0oz Color: Black Frequency Response: 20Hz-20KHz Enhancement: -18dB-+12dB (o line output) 5dB-+25dB (headphone monitor output) Power Supply: 1PCS AAA battery (not included) Frequency Response: 20Hz-20kHz SNR: >92dB Distortion:1 xCollarClipMic 1 x 6.5mm Adapter 1x Pickup 1 x Storage Bag