I sent in your sph10 to plugup.com and had an earplug adaptor added to your device. I could not hear a conversation when above 20 mph. Now with the earplugs I can hear excellent at any speed. I now put the sph10 around neck and leave it there. If the speakers were not as big the use around my neck would be more comfortable. I ride atv all day scouting fields and catch many phone calls. It is usually hot and I also do much walking and helmet doesn't seem to work well. I have many friends in the industry I already have suggested you to, but the awkwardness of the speakers around next is a holdup for some. Thanks, Russ Lutter