Sena Impulse Modular Mesh Intercom Helmet Sena features Mesh Bluetooth technology paired with Harman Kardon premium speakers all neatly tucked into a premium composite fiberglass shell to eliminate the woes routing any wires, microphones, or speakers! The Impulse's seamlessly integrated speakers offer a new level of precision and clarity to baked-in helmet audio, and the newly designed microphone's unprecedented outbound quality will make sure you're heard to the group. The Impulse's Group Mesh Intercom is capable of up to 24 riders in a private group, and the Multi-Channel Open Mesh Intercom mode supports virtually limitless riders! Riding with someone that doesn't have a mesh system. The Impulse has you covered with a 4-way Bluetooth Intercom function as well. To top everything off, the Impulse Modular Helmet features a retractable sun visor for on-the-fly shade, a 4-vent design for all your cooling needs, and an integrated taillight for maximum visibility to those around you. The Impulse is a great option for those that want everything a rider could need in a helmet, all in one package. Features Mesh & Bluetooth Intercom integrated modular helmet Premium Speakers & Microphone by Harman Kardon Multi-Channel Open Mesh Intercom supports virtually limitless riders Group Mesh Intercom supports up to 24 riders in a private group 1.2 mile Mesh Intercom Range (can extend 5 mi with minimum 6 riders) 4-way Bluetooth Intercom (1.2-mile range) 18-hour talk time (varies upon intercom mode and taillight usage) Retractable Sun Visor Voice-Activated Digital Assistant Access (Hey Google / Hey Siri) Voice Commands in 8 Languages Magnetic Pogo Charging Port Optional Pinlock-ready face shield with Pinlock insert included Meets or exceeds DOT & ECE Standards Intermediate Oval Fit