Hill Country Customs Jenson USB & 1/8" Auxiliary Input Jack for Jenson Harley-Davidson HD1BT radios - HC-JENAUX Jenson USB and 1/8" Auxiliary Input Jack for use with the Jenson Harley-Davidson HD1BT radio. The USB port allows for a connection of an external storage device. The 1/8" audio jack allows input of any MP3 player or other external audio device. The included cable is 10 ft long and is ASTM B117 salt spray exposure standard compliant. The panel mounts through a 1 1/2" diameter hole with a threaded housing and knurled securing nut.