1. Voltage: 90~150V AC, 60Hz or 160~280V AC, 50Hz ... : CE, RHOS, CCC Power meter, energy meter, multifunctional mini-ammeter Functions: 1. Measure real-time voltage of the power supply (90~150V ... periods; can be manually cleared into 0.Parameters:1. Voltage: 90~150V AC, 60Hz or 160~280V AC, 50Hz ... for EU version140pcs/ctn for other versions Power meter, energy meter, multifunctional mini-ammeter