GoodQbuy&reg; 3.5mm-Plug Stereo Motorcycle Helmet Multi Intercom Headsets Headphones Earphones ,Volume Control & Extension Cable for MP3 GPS Cell Phones etc Hands-free calling for motorcycles and scooters. Work with MP3 player,cellphone, GPS, and other 3.5mm-plug music players. Back side with self-adhesive tape sticker and velcro band, you can easily install the flat headphones into your motorcycle helmet. an in-line volume control function for convenient to adjust the music volume. Quick release lead, headphones can be left in your helmet. Speakers enclosed in removable soft padded cushions. Come with a 94cm audio extension cable for use.