Garmin StreetPilot 2820 5.6-Inch Bluetooth Portable GPS Navigator For motorcyclists, the navigation audio prompts can be wirelessly sent to the headset using Bluetooth wireless technology Allows simultaneous connection to both headsets & cell phones using Bluetooth wireless technology The optional GTM 10 or GTM 12 provides real-time Traffic Message Channel (TMC) data Loading MP3s is &#8220;drag-and-drop&#8221; easy &#8211; no special software is required Send audio to the car stereo through the 3.5 mm stereo headphone/line-out plug