Great piece of equipment. You have an isolation transformer, variable voltage to bring up you test device and a controlled solder station that runs independant of everything else. The meter is easy to see , voltage goes past line voltage to 150 for more device tests. You can check voltage leaks on test device and polarity. 2 scales on meter to monitor amps. Well built product , a must have especially if its your first piece of equipment to work on tube radios and electronics .