Product Information: 1. AC voltage: 12V~ 1000VAC 2. Frequency: 50Hz/60Hz .3 alarm mode: sound / lighting / analog strip 4. Display: LCD display 5. Probe shape: flat 6. Fire and Neutral: Sound / Light / LCD Analog Bar Tips 7.Automatic shutdown: no induction signal for about 3 minutes or automatic shutdown without any operation 8. Safety level: CAT.III 1000V / CAT.IV 600V; CE 9. Power: 2 section 7 (AAA) battery 10. Product size: 159* 21* 20mm 11. Product weight: 45g How to find a breakpoint: 1. Connect one of the wires to the live wire and connect the other wires to zero or ground to form a loop. 2. Open the test pen and measure from the cable to the live line in the opposite direction. 3. When measuring a normal cable, the battery indicator lights up red and a beep sounds. When the test pens light is off and there is no sound, the position is the breakpoint position.