3.5mm unthreaded audio jack on the head of the microphone. The clear tube provides a more discreet option for those that need to receive messages privately An earphone jack located on the microphone a more→llows the user to receive audio when using this earpiece Compatible, APX 4000, APX 6000, APX 6000XE, APX 7000, APX 7000XE, ASTRO Saber, BPR40, CP125, CP150, CP185, CP200, CP200-XLS, CT150, CT250, CT450, CT450-LS, EX560-XLS, HT1250-LS, HT1550-XLS, LTS 2000, MT 2000, MTS 2000, MTX8250-LS, and more.
