The Pulse drop-in speakers add hi-definition audio to just about any helmet. Featuring a universal fit, the Pulse plugs into most helmet communication systems, audio devices, and Smartphones that use a standard 3.5mm audio jack. The Pulse delivers crisp sound, extreme bass, and unsurpassed music quality. Drop-in the Pulse Speakers in minutes… your ears will thank you! Extreme Bass and Clean Sound: Our audio engineers worked feverishly on the Pulse to bring you high-fidelity sound in a convenient package. Pulse’s sound drivers are designed for maximum performance and deliver the best sound in helmet audio and exceptional music playback. Easily Transfers From Helmet to Helmet: The Pulse design allows you to swap your speakers quickly from one helmet to another without tools. Stay connected to your music and phone calls as you switch from a morning ride on your board to an afternoon ride on your bike, and anywhere in-between.