Haltech WB2 NTK - Dual Channel CAN O2 Wideband Controller Kit Length: 1.2M (4ft)The Haltech Wideband Controller is a plug and play wideband solution for your Haltech system. It allows users to accurately measure air fuel ratios over a wide range and deliver that information via CAN to a Haltech ECU. This product enhances the functionality of all Haltech Nexus and Elite ECUs with its plug and play CAN compatibility. It is easily programmed and controlled through the NSP software. There are two versions of the WB1 and WB2