AdBlue OBD2 device designed for use with vehicles equipped with EURO 4/5/6 emission systems. This device connects via the OBD2 port and is intended for diagnostic purposes only. It may assist in monitoring exhaust after-treatment systems, including SCR and NOx sensor operations, under controlled environments. The unit is easy to install—simply connect to the OBD2 port and follow manufacturer guidelines. It does not permanently alter vehicle settings; removal of the device restores original system functionality. Compatible with select commercial vehicle models. Package includes: 1 x Interface Device, 1 x User Manual in English. Note: Diesel Exhaust Fluid (DEF) is required for compliance with emissions regulations. This product is not intended to bypass, disable, or tamper with emissions control systems in violation of applicable laws. Always comply with local, state, and federal environmental regulations.