Portable pen type multimeter, used to test DC & amp; AC voltage, resistance, positive diode voltage fall and audible continuity. 2000 counts digit LCD monitor with character 12mm high offers clear readings. Use the toggle switch on functions and ranges. Other 3 buttons to lock display value, turn on / off backlight, select resistor, diode or continuity test, change units (DC or AC). With auto range control function, over-range indicator and low battery indicator. Auto Power Off: it will switch to standby mode automatically after 15 minutes if there is no operation. The anti-slip cover with test probe slots can protect multimeters and organize probes as well.