Strong PU cable material with soft transparent acoustic tube Transmit effectively and protect the eardrum from sound wave The Mic wire is 40 inches, and the Air-tube wire is 60 inches covert acoustic tube transmits more clear sound, makes the voice easily heard Compatible with Motorola CP185,CP200D,CLS1110,CLS1410,VL50,RDM2070D,DLR1020,DLR1060,RDU4100,BPR400,XU1100,PRO1150,MU12,Mag One etc.