Mini Stereo Microphone Mic 3.5mm Mini Jack for Recorder PC Mobile Phone/ PC Laptop NotebookNote��Size 1 for Mobile Phone��size 2 for PC Laptop Notebook.Specifications:Unidirectional x 2Frequency: 100-15，000 HzNoise Level: 34dB SPLFront sensitivity (0dB = 1V/Pa): -38dB �� 3.5dBMaximum Input Sound Level: 110dB SPL (THD 1 percent at 1kHz)Plug: L-shap gold-plat mini plug， 3.5mmColor: Black&SilverSize: approx. 57 x 57 x 15mmNet Weight: 9gPackage includes:1 x Microphone