Features-Bluetooth-4-1-Dual-Bluetooth-module-communication-system-Audio-Multitasking-trade-Multi-way-intercom-up-to-8-connections-Group-intercom-Bluetooth-intercom-up-to-2-0-kilometers-1-2-miles-Smartphone-App-for-iPhone-&-Android-Universal-Intercom-trade-Advanced-Noise-Control-trade-Intuitive-voice-prompts-&-voice-commands-Quicker-pairing-for-intercom-HD-quality-crystal-clear-&-natural-sound-Bluetooth-Audio-Recording-trade-Versatile-functions-using-motion-sensor-technology-All-in-one-helmet-clamp-kit-Built-in-FM-radio-tuner-with-a-station-scan-&-save-function-Bluetooth-pairing-for-dual-mobile-phones-Bluetooth-handsfree-for-Bluetooth-mobile-phones-Bluetooth-stereo-headset-for-Bluetooth-audio-devices-such-as-MP3-players-Bluetooth-stereo-headset-for-Bluetooth-GPS-navigations-Firmware-upgradeable-in-open-terrain-Package-Content-Sena-20S-Motorcycle-Bluetooth-Communication-System-Main-Unit-Sena-20S-Universal-Helmet-Clamp-Kit-with-Microphones-Wired-boom-Mircophone-Wired-Mircophone-USB (Universal Serial Bus)-Power-amp-Data-Cable-Micro-USB (Universal Serial Bus)-Type-2-5mm-male-to-3-5mm-male-4-pole-Aux-cable-Sena-20S-Cigarette-Charger-Glued-Surface-Mounting-Adapter-Rubber-pads-Speaker-Pads-Velcro-Pads-for-Speakers-Velcro-Pad-for-Boom-Microphone-Velcro-Pad-for-Wired-Microphone-20S-Power-amp-Data-Cable-Allen-Wrench-Foam-Speaker-Covers