Trailer Tester, Compatible Trailer Type Semi-Trailers, Material Steel, Connector Type 7-Way Round, Control Type Manual, Remote, Operating Voltage 12V DC, Features State-of-the-Art remote-controlled diagnostic trailer tester. Power lights: Manually/All-On/Auto Scan or by remote control. Audible and visual alerts: cross/open/overloaded/short circuit indication. Test ABS fault blink codes via auxiliary and brake circuit activation. Performs leak down test on service and emergency lines.