FEATURES State-of-the-art motorcycle and powersports Bluetoothcommunication system provides a sleek and aerodynamic design that offers a versatile jog dial that maximizes the ease of use for riders Features Bluetooth 4.1 technology with dual Bluetooth communication modules, to create one of the most advanced Bluetooth headsets in the market; the new Bluetooth technology increases the performance and reliability of the headset while also allowing for increased high-definition audio quality With the 20S, users can call hands-free with their Bluetooth mobile phones, listen to stereo music or voice instructions of GPS navigation by Bluetooth wirelessly, and have intercom conversations in full duplex with a passenger or other riders 20S Evo model features an updated design with Audio Multitasking technology that allows for a seamless blend of incoming and outgoing audio to create a mixed audio experience, versus the traditional interruption-based audio technology of other Bluetooth devices Advanced Noise Control Versatile bike-to-bike conference intercom with up to seven other users Intercom working distance up to 1.2 miles in open terrain Multipoint Bluetooth for dual mobile phone HD Quality crystal-clear and natural sound Intuitive voice prompts and commands Built-in FM radio tuner with a station scan and save function Comes with HD Speakers designed with a beveled taper to fit easily into helmet pockets All-in-one helmet clamp kit Quick Bluetooth pairing Universal Intercom with other brand communication systems Water-resistant for use in inclement weather Firmware upgradeable Linking your 20S EVO with the Sena Utility App (for iPhoneand Android) allows you to configure device settings and access our quick start guide at the click of a button Single Kit Includes: 1- Bluetoothheadset main unit 1- Universal helmet clamp 1- Wired boom microphone 1- Wired microphone 1- USB power and data cable (micro USB type) 1- 2.5 to 3.5mm audio cable 1- Cigarette charger 1- Glued surface mounting adapter 2- Rubber pads 4- Speaker pads 2- Foam speaker covers 2- Hook-and-loop pads for speakers 1- Hook-and-loop pad for boom microphone 1- Hook-and-loop pad for wired microphone 1- Allen wrench (for attaching clamp kit) Dual kit includes two single kits in one box