Features: 

• This great little adaptor allows you to use your favourite headphones or earphones with your mobile phone
• Simply plug in the cable into your mobile's MiniUSB port and then connect your headphones and enjoy high quality sound and listen to your favourite MP3's.
• Use this mic adapter to connect any external 3.5mm microphone to your HERO3 camera
• Mini USB to 3.5mm Headphone Jack for Mobile Phone
• Simple Plug and Play
• Allows you to use any headphones with your mobile phone
• Colour: Black
• Length: approx. 11.9cm/ 4.69"
• Compatible with: Gopro Hero 3， 3+

Package included:

• 1 x Mini USB to 3.5mm Jack Headphone Earphone Audio Adaptor Cable