DUTEST pro continuity and line tester. For testing high and low resistance resistors. Continuity display optical/acoustic. Continuity and diode test via LEDs and buzzer. Display via 3 LEDs: 0 - 100 Ohm/ 1 kOhm/ 10 kOhm. Max. resistance test value 10000 Ohm Acoustic display via buzzer up to 100 Ohm. External voltage proof >50 V AC/DC yes. External voltage display 6 V - 400 V LEDs/buzzer. Polarity test. Single-pole phase conductor test. Non-contact cable break detector. Flashlight function yes. Precise high-performance LED flashlight. Buzzer volume and brightness of the LED flashlight individually adjustable in 4 levels. Integrated magnet holder and belt clip on the back of the housing. Measuring circuit category Cat III. Max. voltage measuring circuit category 300 V.