Neewer NW-V01GP Lavalier Lapel Clip-on Omnidirectional Condenser Microphone with Windscreen and Wind Muff for GoPro HERO3 HERO3+ HERO4 Cameras Specially designed for GoPro HERO 4, HERO3+, HERO3 Polar Pattern: Omnidirectional Frequency Response: 50 Hz to 20 kHz Sensitivity: -35 dB +/- 3 dB (0 dB = 1 V/Pa @ 1 kHz) Cable Length: 1.2m (47")