The GoPro Wireless Microphone Transmitter adds convenient wireless audio to compatible GoPro cameras and supported mobile phones without plugging anything into your recording setup. Weighing just 10g, it clips to clothing or attaches with the included magnet, recording voices clearly from up to 100m away without a cable. Bluetooth connectivity, Dynamic Noise Reduction, and the supplied windscreen keep speech clear indoors and outdoors, with up to 6.5 hours of battery life.