Key Features Automatic digital display, intelligent detection, isolated operation, power supply inspection, safety device, intelligent digital display No current: white interface, no voltage Live wire: Rojointerfaz, high voltage Zero line: Verdeinterfaz, low voltage Brand: BSIDE Model: A1 Color: Black Shell Material: ABS Display: LCD Maximum Display Value: 2000 Digits Polarity Indication: Self-indicating, '-' means negative polarity Over-range Display: 'OL' or '-OL' Sampling Time: The meter figures show about 0.4 seconds Automatic Power Off Time: 5 minutes Battery Low Voltage Indication LCD display symbol Operational Temperature: 0~40 / 32~104 Storage Temperature: -10~60 / -4~140 Operating Altitude: 2000m Battery: 1.5V AAA x 2 ( Not Included ) Automatic Measuring Range: YES Full Measuring Range OverloadYES Protection: YES Flashlight: YES V-Alert (NCV): YES Live / Neutral Wire Check: YES Breakpoint Locate: YES Automatic Identification: YES A1 fully automatic intelligent digital multimeter fully automatic defrosting, easy to operate, it is recommended to easily compare circuit faults and solve wiring problems