The Twiins D1VA Bluetooth Helmet Kit is a quick and easy way to make your helmet bluetooth ready. Receive your calls easily whilst riding, providing a hands free experience.Single speaker build with all electronics being integrated into the speaker.Red/Blue LED indicator informs the system status, located in the microphone, along side the one button control.Dual Link Functionality - stays connected to your phone even when connected as an intercom.Rechargeable by USB cable.The Twiins D1VA Bluetooth Helmet Kit provides all of the benefits of a dedicated bluetooth system at a fraction of the price. Being low profile and consisting of only one speaker and a microphone, it is guaranteed to fit into most helmet models. Very easy to install and setup, you can be speaking with your pillion using the intercom functionality by linking to a Twiins D3 device.