![RELM RBU800A Manual Download Page 15](http://html.mh-extra.com/html/relm/rbu800a/rbu800a_manual_1436517015.webp)
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Rear Panel View
? Antenna Connector
Used to connect external antenna.
? Power inlet Connector
Adopt RELM-authorized DC power cable and 13.6 V input AC power.
? Speaker Jack
Used to connect external speaker and only available for the plug of 3.5 mm.
? GPS Antenna Jack
? 15 Pin Connector (for accessories)