? Full function: AC / DC voltage, AC / DC current, resistance, continuity, capacitance, frequency test possible, maximum display 6600 count, Ture-rms ? Easy to use: With backlit display easy to read in the dark. Zero clearing and data retention reduces the impact of affected data, helps to obtain more accurate measurements, and provides both autoranging and manual scaling. Suitable for professional or new users ? Safety protection: Built-in explosion-proof ceramic fuse tube, reverse polarity protection, double protection, safer and more reliable, low battery indication, suitable for all range overload protection. ? Continuous Tester: buzzer sounds, warning light flashes, sound conduction sensor confirms circuit continuity ? Flame retardant material Shell: The shell is made of a flame retardant material that functions even in high temperature environments and is suitable for flames.