The Impulse is a modular smart helmet featuring Sena’s industry-leading Mesh Intercom and Bluetooth Intercom technology plus premium speakers and microphone by the audio experts at Harman Kardon. With the help of Harman Kardon, the Impulse’s expertly tuned speakers bring a new level of precision and clarity to in-helmet audio, plus an all new microphone for unprecedented outbound audio quality. The helmet boasts an integrated rear-facing taillight for rider visibility and a convenient retractable sun visor. Impulse was built with a DOT-rated composite fiberglass shell and has an intermediate oval fitment. Four strategically placed vents, a chin vent, top vent, and two exhaust vents allow airflow while riding. This helmet complies with Federal Motor Vehicle Safety Standard 218 (FMVSS 218).