A/T Headset (Beyer.4-Pin Lemo Conn)
Galaxy Audio ECMR/52HSD ECM Headset System Freq CODE D
Galaxy Audio ECMR/52HSL ECM Headset System Freq CODE L
Galaxy Audio PSER/52HSD PSE Headset System Freq CODE D
Galaxy Audio PSER/52HSL PSE/52HS Headset System Freq CODE L
JK Audio BlueSet Wireless Headset Interface (Female 4-Pin)