The ElectriCalc LT is an electrical handheld calculator that helps solve electrical calculations in compliance with the NEC. It works in volts, amps, volt-amps, watts, kVA, kW, power factor percentage, efficiency percentage and DC resistance. It can calculate wire sizes for copper or aluminum in various insulation ratings and it adjusts for ambient temperature. It figures voltage drop, parallel conductors, de-ratings and grounding conductor sizes. It also works as a standard math calculator and has a battery-saving auto-off feature. Includes user guide, vinyl case, lithium battery and a one-year warranty. The retail price is $49.99.