Do not touch the probes directly with your hands to avoid and personal safety during testing Before use, inspect the test probes to there is no damaged 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 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 depending on the batch, but this does not affect use) Color: As shown Material: ABS Package Contents: 1 set * capacitance test tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.