My 665 stopped powering off after first couple of uses. Suspect battery needed time to juice up even though 665 was on direct DC power.

The XM music will stop and I hit MUTE then UNMUTE and it plays.

HOW DO I GET TWO HELMETS LISTENING TO 665 XM MUSIC SIMULTANEOUSLY? IDEALLY THROUGH BLUETOOTH?

I can link individual Bluetooth Helmets to 665 Bluetooth Audio and listen to 665 music through Bluetooth one Helmet at a time but not two Helmets simultaneously. (Appears 665 only allows for selecting one Audio device) What (workaround logic) to do to get both helmets listening simultaneously???
Total Ideal scenario
Driver Cellular through 665
Passenger Cellular through Helmet Bluetooth
Driver to Passenger Comm (Using Bluetooth or recommend other method.)
Driver Helmet music using Bluetooth and Passenger Helmet music using Bluetooth simultaneously.
Dicked with this for a couple of hours to no avail.