TPI 183A TRMS Digital tester has a 4,000 ct. LCD screen. The TRMS capabilities provide more precise readings. This meter has Automatic/manual ranging, can take Temperature, Duty cycle to measure the amount of time the motor is on, Low pass filter for loud surroundings, Fuse and battery compartment are apart, Automatic-off, Infrared serial interface, cULus 61010-1, CAT II - 1000V, CAT III - 600V safety-rated, 3yr. Ltd. Warranty.