Motorola Solutions PMLN6129A Smart 2 Wire W/Trans Tube, Black Durable, rugged cables to withstand difficult conditions Two-wire feature. One wire for receiving transmissions and one for wire with a combined mic for push-to-talk A quick-disconnect, durable and comfortable translucent tube enables easy sharing of this kit between shifts IMPRES technology allows for communication between the radio and the audio accessory Compatible with APX 2000, APX 4000, DP3400, DP3401, DP3600, DP3601, DP4400/DP4401, DP4600/DP4601, DP4800/DP4801, XPR 6300, XPR 6350, XPR 6380, XPR 6500, XPR 6550, and XPR 6580 series radios