How it works:
Industrial Craft was always trying to motivate players to use most of its tools to get maximum from the mod. IC2Classic is no exception. There is one VERY IMPORTANT thing to keep in mind. For additional information to be shown, you have to have several tools present on your hotbar.
Tools on hotbar or inside armor helmet:
EU-Reader: will show additional EU related information (MaxInput, EnergyUsage, EnergyStorage, etc.);Crop Analyzer: will show additional information about crops;Thermometer: will show additional information about brewing and various heat-related info from reactors, boilers, etc.Instead of Thermometer, you should use TreeTap to display info about brewing;
Probe Item: will show all of the above combined. Also can be integrated into Nano/Quantum Helmet.Join Speiger's Hideout to get in touch with IC2Classic community and seek for help/advice:

Other addons for IC2Classic: