6 Ft long . Brand new. Yaesu amplifier relay keying cable for the FT-450 , 991 (A) , 950 , 900, 840, 857, 847 (HF), 817 , 891, 897( D) and FTDX-1200 radios. 8 pin mini DIN that terminates into an RCA plug on the amplifier end of the cable. Copper shielded cable.