CAT IV 600 V; Cat III 690 V safety rating Fluke"s family of Two-Pole Voltage testers comply with both regulation HSE GS 38 (tip caps) and IEC EN 61243-3: 2010. Switchable load: avoid display of ghost voltages allowing you to draw more current from the circuit under test and avoid trip residual-current devices (RCDs) Backlit graduated scale and backlit indicators Phase rotation indicator for 3-phase systems 4 ways to detect ac/dc voltage A clear; instantly visible LED indicator; a bright digital display of the measurement value; an audible continuity test; and vibration to give tactile feedback Audio on/off for testing in quiet areas. Low battery indicator Dual insulated cable tested to 3x the required bend angle provides increased reliability and durability