Introducing Wadfow AC Voltage Detector 1000v: Detect AC Voltages from 12V to 1000V at 50/60Hz frequency. Ideal for various environments with -10 C to 40 C operating temperature, CAT. IV 600V safety compliance, and hot/neutral line distinction. Compact design with auto power off feature, powered by 2×1.5V AAA batteries. Stay safe and efficient!