DMM 310 TRMS Digital Multimeter, 1,000 V AC/DC, 10 A AC/DC, CAT III 1,000 V with Carrying Case DMM 310 TRMS, digital multimeter with automatic range selection and TRUE RMS measurement. Voltage measurement up to 1,000 V AC/DC, current measurement up to 10 A AC/DC. Measures resistance, frequency, capacitance, and temperature. Features Data Hold, NCV, and backlit display. CAT IV 600 V, CAT III 1,000 V. Includes 2 1.5 V AAA batteries, 2 test leads, and 1 temperature probe. Includes carrying case. Technical Details