Echo 06-661 Echo Com Blue Tooth Headset Black The Echo-Com gives any helmet Bluetooth and intercom capabilities without the need to stick anything onto the outside of the helmet Easy helmet installation - works in most helmets Up to five hours intercom or six hours phone talk Up to eight hours audio listening Easily installed on any helmet and no sewing or special tools required Clamps adjusts for 7/8 inches to 1-1/4 inch handlebars and will fit most bikes Multiple adjustment options Internal resistor for surge protection Cellphone, GPS or MP3 charger and bracket; iPhone, mini-USB charger tips and battery connnector included Comes standard with 1 year manufacturer defect warranty on parts and workmanship