BLCKTEC 420 OBD2 Code Reader and Car Diagnostic Tool User Manual The BLCKTEC 420 is a Bluetooth OBD2 scanner and diagnostic tool that can read and clear OBD2 engine codes, display live data, and run battery and alternator tests. The BLCKTEC 420 is a powerful OBD2 scanner with a 1.8″ color screen that can quickly […]