AceList Professional Mini USB External Microphone with Collar Clip for GoPro Hero 3 3+ 4 Plug & Play design, convenient to use. Ultra long design, cable up to about 59"(150cm) long, accessible to your mouth even though you are using monopod With metal clamp on the microphone, you can clip this product on your collar for better recording sound Compatible with GoPro Hero 3 3+ 4. Length: approx 20cm/ 7.9"(Adapter Cable); approx 150cm/59"(Clip Microphone)