PrymeBLU® Headsets, Speaker Mics & wireless accessories for L3 Harris Radios (models with Built-in Bluetooth)


L3HARRIS- BT-537 Wireless Headset Adapter for L3Harris P5300/5400 and Unity XG-75

Wireless Adapter (Dongle) with x37 connector. Fits L3Harris M/A Comm and Unity XG-75 multi-pin radios. Power from radio - no battery required. PLEASE NOTE: Due to RADIO power supply issues the BT-537 CANNOT be used with the P7xxx Series (7200/7300/7400) radios The PRYMEBLU® Adapter allows you to use any compatible wireless headset or other audio accessory with your two-way radio. The PRYMEBLU® Adapter is compatible with thousands of off-the-shelf consumer audio accessories and pairs easily, allowing you to operate wirelessly.


  • Fits the L3 Harris M/A Comm P5300/5400/7400 and Unity XG-75 series radios.
  • Compatible with thousands of readily available Wireless headsets and other audio accessories. (audio accessories not included)
  • Easy pairing process. Stores paired connection to the wireless headset even if the Radio is powered off or adapter is removed from the two-way radio.
  • Several Push-To-Talk options: use the PTT button on the PRYMEBLU adapter to initiate transmissions, or use an optional PRYME Wireless PTT switch (part number BT-PTT).

NOTICE: This model cannot use our patent pending Auto-switch feature so to operate the radio normally (say if your BT headset fails) you must remove the adapter from the radio.

  • BTH-300-MAX
    BTH-300-MAX Wireless microphone kits for Phone & Tablet Apps, 9 different versions! Includes built-in wireless PTT. Includes charger and charging cable.
  • BTH-550-MAX
    NEW BTH-550-MAX - Wireless Speaker Microphone with ROTARY volume control and built-in wireless PTT
    $175.00 $135.00
  • BTH-700/800/900-MAX
    NEW MAX series Wireless Ear Muffs - Rugged Over-the-head headset with noise-cancelling boom mic and padded speaker. Includes USB charging cable and wall changer.
Name: Version: Date: Size: