I've used the ACS PRO27 communicator with bottom exit cable since 2022. I plug it in to a FiiO BTR3 Bluetooth amp in my pocker that is paired to my Zumo XT. Have been delighted with it. Ear moulds taken by Boots locally and sent to ACS and everything fits like a glove. Comfy all day and the filter allows you to hear background noise yet blocks the wind noise.
FiiO BTR3 Bluetooth Headphone Amp Accessories Connect your ACS IEM's or Coms via Bluetooth using the FiiO BTR3 - The first Bluetooth amplifier in the world to support all current wireless audio codecs.