ECUMASTER Plug and Play adapter for the 1999-2000 Mazda Miata NB1 with manual transmission allows for plug and play installation of the EMU Black standalone ECU. All ECUs are sold separately. Give your Miata what it needs! Perfect for NA or Turbo builds, this adapter allows you to plug an EMU Black directly into your vehicle. Factory features are retained such as alternator control and A/C (including idle up). The factory clutch switch is connected through the adapter to allow for launch control and flat shift features. Use of the factory vehicle speed sensor allows for boost per gear/speed as well.