Review on Enhance Your Riding Experience with Sena SC-A0315 Universal Helmet Clamp Kit - Compatible with 20S EVO, 30K, 40 mm Lautsprecher by Farhad Cantu

The clamp was fairly easy to install although instructions would have been nice. There are a few extra items, apparently for other helmets. I've found that you get the best sound with the earbuds as there really wasn't room for the headphones in my half helmet. Saves $ by not having to purchase a separate Sena device. I could use one from my other helmet.