ITEM NAME:Motorbike Helmet Speakers Volume-Control for Motorcycle MP3 IPOD +Extended Line Description Features: Brand new and high quality. 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 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. Suitable for helmet, with volume adjusting function Specifications: Connection: 3.5mm 3-conductor plug (with 2 Insulating rings). Please check if the item is suitable for your device before puchasing. Plug Diameter: 0.14inch/3.5mm Colour: black. Earphone Line Length: Approx. 51.18inch/130cm Extension cable Length: Approx. 39.37inch/100cm Earmuff Diameter: Approx. 2.17inch/5.5cm Package Included: 1x 3.5mm Helmet Earphone 1X 3.5mm Extended Line Note: 1. Fit for most 3.5mm jack devices such as CD, radio, repeater, mp3, mp4, game machines, phone, tablet. If the device has line control volume adjusting, line control making telephone calls, earphone mic function, the earphone will not show these functions out. 2.Please allow a little size error due to manual measurement. 3.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality store for you! Motorbike Helmet Speakers Volume Control for Motorcycle MP3 IPOD +Extended Line.Connection: 3.5mm 3-conductor plug (with 2 Insulating rings). 1X 3.5mm Extended Line. Extension cable Length: Approx. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.