It is a Tester/2in1 Digital Voltmeter Ammeter, Voltage measuring range: AC60~300V, Current measurement range: AC0.0~50.0A, Measurement accuracy: 1% + 2 digits, Applications:The meter can be used in charger, inverter, solar energy, wind turbines, LED lights measurement, distribution box, voltage regulator,education appliances, appliance Repair, flapper, etc.