... 133kHz pulsed at 8HzSheath fault mode8Hz for sheath fault; 577&33kHz for tracingOutput voltage (max)Sheath fault30 ... , Resistance:5~3000ΩOutput protection240 VrmsPower8 alkaline LR14 © cellsTypical batteryOne 8# battery, working for 4-8hoursCharger220V,50~60HZ ... , optical 12V car chargerLCD displayAutomatic backlight,display output energy, mode,self ...