Designed to simplify your communication system, this kit allows you to seamlessly switch between helmets without the hassle of removing speakers and the boom. With JBL's renowned audio quality, you'll enjoy clear, immersive sound whether you're riding solo or communicating with fellow riders. Installation is a breeze, ensuring that you spend less time on setup and more time enjoying your ride. Elevate your riding experience with the 2nd Helmet Kit, making it easier than ever to stay connected and entertained on the road, no matter which helmet you choose. 40 mm speakers with Sound by JBL. Interchangeable boom and wired microphones. Suitable for virtually all helmets (except half helmets). Note: This product is NOT compatible with Packtalk Slim and Packtalk Edge.