If you have an MP3 attached to your motorbike， get great sound whilst you're on the move with this pair of helmet speakers. The soft， padded speakers attach to the inside of your helmet by Velcro pads (included)， have a volume dial controller as well as an extra long section of cable which connects via the jack should you need more length.Specifications: Color: Black Material: Plastic. Connection: 3.5mm jack. Attached cable length: 132cm Cable extension length: 100cm Package size: 2 speakers. Size:5.8cm x 5.8cm.