The old easy way to get bluetooth was to use the Jabra A-210, they were cheap adapters, but are getting hard to find. Unless you rigged up transmitter to trigger the push to talk you were going to be limited to VOX.
http://www.k7sfn.com/projects/bluetooth.htmlhttp://www.alexloop.com/artigo35.htmlIm sure there are new offerings out there, I found this one for $20
AGPtEK B6 Bluetooth 4.1 audio receiver/transmitter is a magic device that can add Bluetooth capability to your None-Bluetooth audio source device like TV, iPod, CD player, PC, MP3/MP4, and transmit audio to your Bluetooth headphone, Speaker and other stereo system.
Specifications
- bluetooth receiver: 4.1 + EDR
- bluetooth transmitter: 2.1
- transmission distance: 32.8ft
- support bluetooth profile: HFP,HSP,A2DP,AVRCP,SPP
- battery: rechargeable li - polymer battery (600mah)
- Charging input voltage: DC 5V
- Working time: Up to 8 hours(depends on the volume of the audio)
- Charging time: About 2 hours
-Input / output connection: 3.5MM stereo interface
-Item dimensions: 3.82 * 2.28 * 4.72in
-Item weight: 1.34oz
Heil has a bluetooth solution you may be able to adapt/incorporate. Its the Heil HBA for under $120
Blucomm also had bluetooth adapters.
Lot of options, you can buy very cheap 433 mhz transmitters and receivers if you want to get away from
bluetooth and dont mind a small project.