DRUnKQUEEn 1000m FM Intercom Motorcycle Wireless A2DP BT Interphone Waterproof Bluetooth Helmet Headset Earphone Headphone Motorbike Motorcycle MP3 GPS Designed for installation into most open-face, flip-front and full-face style helmets Hands-free on your Bluetooth mobile phone, listen to stereo music or voice instructions of GPS navigations by Bluetooth wirelessly, and have intercom conversations in full duplex with a passenger or multi-pair up to 3 Riders in a large group and talk between any 2 of them in a range of 1000M (3,280 feet) distance Bluetooth Specification v3.0+EDR supporting the following profiles: Headset Profile, Hands-Free Profile (HFP), Advanced Audio Distribution Profile (A2DP) Superior audio fidelity has been achieved with our wide-fidelity, non-ported and ultra-slim helmet speakers Main unit is powered by a rechargeable Lithium Ion/Polymer power cell providing 8-12 hours of use from a full charge