Emerald M3D fully programmable (32 bit processor) ECU. The serial number is: 41131. It can be used as a standalone ECU. It will run NA and pressure charged engines. Full injection and ignition control, idle control, narrow band lambda input and direct immobiliser compatibility with the Rover MEMS security modules. It can be wired in with a 36 pin econoseal plug, alternatively you can buy a ready made loom / harness from Emerald. You can download the Emerald software and instruction manuals which allow you to set up the ECU yourself - http://www.emeraldm3d.com/software-manuals. You will need an Emerald serial lead to do this or Emerald or most other rolling roads can do this for you while mapping. This was used to run my R400K and when mapped by Emerald produced 225bhp. The only reason for selling is that I have upgraded to a new Emerald and no longer use this one. Emerald gave it a bench test last week when I was over there and everything works as it should. £350