The Mac Tools Heavy Duty Digital Multimeter, No. EM823, offers Bluetooth and USB communication, as well as a record-mode with max/min/avg settings. The heavy duty multimeter has a 50,000 count backlit display, a pulse width of 0.5 to 250.00ms and an analog bar graph. It offers the same options as the company's EM721, and also offers conventional high-voltage ignition analysis, electric motor test, ECU test, ignition peak vs. ignition burn time, and vehicle ground test. The multimeter has a 1000V CAT III rating, an IP 40 rating and is CE/ETL certified.