The SignaLink SL-1+ provides all the features of our original SignaLink Model SL-1, “plus” more!  With full support for ALL radio Mic, Data, and Accessory Ports, the SL-1+ can be attached to the radio’s Mic jack, or to the back of the radio (Data or Accy Port), so that you can keep your microphone plugged in!  This permits easy switching from Voice to Digital operation (great for SSTV!), and provides the same functionality as other more expensive interfaces.