Motorola RKN4074B is the genuine programming cable for the GP-Professional series full-size radios, which includes the GP320, GP330, GP340, GP360, GP360 and the MPT series GP640 & GP680.
Note: This is the genuine original programming cable for the GP340 series radios that requires the Motorola Radio Interface Box (RIB). It will not work without the RIB box. This is the only cable that's capable of updating the radio's firmware. However, if you just need to program the radio, see our alternative USB cable below.
Cheap & Convenient USB Alternative: We also have our own alternative to this cable. Please see our Motorola GP340 USB Programming Cable. However, it's only for programming. You'll need the genuine cable and RIB (see above) for firmware updates.