【High Precision Pen-Type Digital Multimeter】The voltage tester accurately measures AC voltage: 2V ~ 600V, DC voltage: 200mV ~ 600V, resistance tester 200Ω ~ 60MΩ, diode test and continuity alarm. 【Multifunction Multimeter】Humanized design with 2000 counts, diode test, continuity, data hold, automatic range control, automatic power off and low battery indication, backlight and lamp function. 【Over-range Indication】AP-38B pen-type multimeter support Double insulation (Class II protection), 600V (CAT), this digital pen-type multimeter features small size, portable and stable performance, a good tool for electrical testers and home electrical problems. 【Auto Power Off】When measuring exceeds 15 minutes without changing modes or pressing The meter will enter standby mode. Press any button to exit standby mode. You can also press and hold the "SELECT" button to select the resistance, diode, or continuity test mode and the desired AC/DC voltage.