Miracle Sound 3.5mm Female Microphone Adapter Cable to fit the GoPro HERO3, HERO3+ & HERO4 Heavy Duty Flexible Rubber Jacket Professional Quality and Construction Adapts any standard, TRS or TRRS 3.5mm microphone cable to fit the GoPro HERO3, HERO3+ & HERO4 reat for connecting any 3.5mm audio output to a powered speaker 100% Satisfaction Guarantee