My Sena SRL arrived last night and I charged it overnight. Installed in my Shoei Neotech II helmet today. Since the helmets were made for the Sena SRL the install was super easy. It took longer to take off and replace the side foam in the helmet than to do the install. Helmet was pre grooved for the install so the wires, mic, and ear pieces all had spots to go. Connected to my phone via bluetooth and the music played nicely. Great sound (at least for my ears). Amazon had a deal that if you applied for one of their credit cards you would get a $150 gift card. So my wife and I both applied for a card (on separate Amazon accounts) and both got $150 gift cards. So my two Sena SRL units cost me $300, Can't beat that with a stick. We will keep the cards for a month or two then cancel them.