Garmin Accessory Cable Assy On-The-Go micro USB 6 ft. The water resistant and secure connection allows you to power an external device via USB such as a phone or media player from your Garmin chartplotter. You can also power your Chromecast or Roku - with a coupler and HDMI cable (sold separately - and then stream video wirelessly to your chartplotter. Specifications for Garmin Cable Assy On-The-Go micro USB 6 ft: Manufacturer: Garmin Color: Black Size: 6 ft Package Contents: Garmin Cable Assy On-The-Go micro USB 6 ft Garmin 010-12390-11: Accessory Cable Assy On-The-Go micro USB 6 ft