The Snap-on Pro-Link Ultra Heavy-Duty Diagnostic System, No. EEHD704004, provides essential maintenance functions that let technicians read and clear fault codes, monitor vehicle and driver performance with trip data, create health reports and view live system data on light duty diesels to Class 8 heavy duty trucks. The Pro-Link Ultra Heavy-Duty Diagnostic System provides essential maintenance functions, including: the ability to read and clear fault codes; access trip data to monitor vehicle and driver performance; create health reports; and view live data to verify performance. This tool offers an 8-1/2" color display, touchscreen operation, automatic brightness adjustments, hard shell carrying case, Li-ion battery pack and more.