Saramonic Go-Mic Professional Mini Stereo Ball Travelling Microphone GoPro Mic with Windshield for Gopro Hero4 Hero3 Hero3+ Action Cameras Go-Mic is a professional, specially designed stereo microphone for use with GoPro Hero4, Hero3+, Hero3 cameras. It will plug directly into GoPro cameras without any adapters or cables. Improves dramatically the sound quality and audio levels of your GoPro audio. Tech Specs - Transducer: Electret Condenser / Frequency Range:35Hz ~ 20KHz / Signal/Noise:80dB SPL / Sensitivity:-24dB +/- 3dB / 0dB=1V/Pa, 1kHz / Weight:12g (0.42oz.) No batteries required.