Feature: 1. The lamp holder can be plugged and unplugged quickly to prevent internal parts from being burnt out. 2. Accurate measurement, the meters accurately display to facilitate your measurement. 3. Small and portable power tester, easy to carry out for measurement work. 4. Power overload protection, the test will stop when a certain power is reached. 5. Sturdy and durable, made of high‑quality ABS material, can be used for a long time. Specification: Item Type: Electric Tester Material: ABS Working Power Supply: 85~240VAC (wide voltage) AC Voltmeter: 0~300VAC, measurement accuracy 0.5% AC Ammeter: 0~2A, measurement accuracy 0.5% Power Factor Meter: 0~0.999, measurement accuracy 0.5% AC Power: 0~600W, measurement accuracy 0.5% Frequency: 0~100HZ, measurement accuracy 1% Annual Electricity Consumption: 0~9999KWH, measure the electricity consumption of the test product in one year DC Power: 0~300W, measurement accuracy 0.5% DC Voltmeter: 0~150V, measurement accuracy 0.5% DC Ammeter: 0~2A, measurement accuracy 1% Power Efficiency: 0~1, measure the ratio of the input power to the output power of the power supply. Package List: 1 x Electric Tester2 x Resistance