ST-189 Stereo Mic External Microphone with a 3.5mm to Mini Micro USB Adapter Cable for GoPro Hero 3 3 + plus 4 AEE Sports Camera Stereo microphone This will dramatically improve the sound quality of your recordings. Microphones pick up a greater range of sound frequencies of internal Camera and housing are not included. Frequency response: 100 - 10,100hz Sensitivity: -38dbv,  3.5dB