Voltage and continuity tester. Suitable for electrical engineering, industry, maintenance, service (troubleshooting). Voltage from 12 V - 1,000 V AC / DC (LED) Display levels: 12, 24, 50, 120, 230, 400, 690, 1,000 V AC/ DC Optical continuity test up to 100 k¿ (yellow LED) Phase rotation (green LED) / phase test (red LED), polarity test (LED) Direct display without pressing a push button (high-resistance test) Load connection via push button (low-resistance test) Intentional triggering of the residual current device Vibration alarm in the test handle Switchable measuring point lighting Protection class IP 65 (dust-tight / jet-proof) Robust housing design with rubberized grip surface Overvoltage category CAT IV 600 V, CAT III 1000 V Incl. 2 x 1.5 V micro batteries (LR03 / AAA) (voltage display from 50 V also with empty batteries!) Tested and approved in accordance with DIN EN 61243-3, VDE 0682-401:2011-02 Technical data DUSPOL ®expert 1000 Display LED Display levels 12 - 1000 V AC / DC Acoustic and optical continuity test Buzzer + LED 0 - 100 k¿ Diode test Continuity / blocking direction Rotary field test green LEDs (right/left) ) Single-pole outer conductor test red 'flash' LED Polarity test LED (+/-) Cable break detector yellow LED (flashing) Load connection via push button IS=550 mA (1000V), 30 mA FI tripping Vibration alarm Yes Measuring point illumination white LED Protection class IP 65 Article number M611E .