RSB numbers are for the physical gear box and not the electronics inside. The RTR inside is what is important. The full part number is needed when asking about compatibility. I will say that gear box (RSB0072) normally has a -60 or -61 RTR inside which is analog for the older systems like NN1 and Vx2. You need a DRS (Digital Radar Scanner) to work with the NN3D, TZT, TZT2, or TZT3. I agree with Kicker; the RSB0072 isn't going to work.