LAUNCH (301050098) CR-HD Code Reader for Heavy Duty Applications Reads and clears active and inactive trouble codes for Class 4 (14,001 pounds) through Class 8 (33,000 pounds and over) heavy duty trucks Covers J1587, J2708, and J1939 protocols for accessing engine, transmission, brakes, and more Kit includes: heavy duty reader tool, 6-pin Deutsch connector, 9-pin Deutsch connector, extra-long 6.5 feet cable, and rugged padded storage case Monitor all data and view live data streams on the full color LCD display Free internet updates