Do not touch the probes directly with your hands to avoid electric shock and ensure personal safety during testing Before use, inspect the test probes to ensure there is no insulation or exposed metal Do not use the current and voltage ranges interchangeably to prevent damage to the instrument It is best to remove the batteries when not in use for a long time to prevent battery corrosion of other internal components of the instrument If you do not know the magnitude of the voltage or current to be measured, start with the highest range and then select the appropriate range based on the measured value Automatic selection of measurement functions and ranges Full-range overload protection Maximum voltage allowed between the measurement terminals and ground: 600V DC or 600V AC. Operating altitude: up to 2000m. Display: LCD Maximum display value: 6000 digits Polarity indication: automatic indication, "-" represents negative polarity. Over-range display: 'OL' or '- OL' Sampling time: approximately 3 times per second Unit display: Displays functional and electrical unit indicators Auto power-off time:15 minutes Power source: 750mA lithium battery Temperature coefficient: less than 0.1 x accuracy/℃ Working temperature: 0 ℃ -40 ℃ Storage temperature: -20 ℃ -60 ℃ (The product appearance and printed words may vary depending on the batch, but this does not affect use) Color: As shown Material: ABS Package Contents: 1 set * capacitance test tool