The CASDT3/5 TA3F to TA5F Stereo Summed Return Cable (18") from Remote Audio is a stereo summed return cable that allows you to connect a Sound Devices mixer or recorder to a Lectrosonics transmitter via the mix out/tape out on the Sound Devices unit. The cable is 18" long and has a TA3F connector at one end and a TA5F connector at the other.