The 065-0086 is for the the Garmin GPSMAP 276, 376, 378 and 478 as well as aviation models 296, 396, and 496. Beautiful aluminum and stainless steel construction that has come to mean TOURATECH.
Compact, flat design mount with rubber isolators to protect the electronics. Powercord connection is done (manually) before the GPS is placed into the mount. The power cable requires some effort to insert and remove from the GPS, so it is not possible to have the cable permanently attached to the mount. However, the 276/376 power cable is very secure and will NOT vibrate out of its socket.
The 376C XM antenna port is accessible. For Audio output, this mount may require a minor user-modification if your headphone plug is large.