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We also advise that you keep these instructions in a safe place for future reference as may be needed. Technical Parameters: Model: UM25/UM25C. Display screen：Operation Instruction: After power on, welcome interface will be displayed firstly, then main measurement interface will be shown. Interface 1: Detector Instructions. '2” ,, ' ' ”~Mttt'ons thank you for t housing our USB Safety Detector, this is electronic. ('qtllplttt'ltt with compact size, The Eversame USB Digital Power Meter aka Juwei USB Safety Tester Model J7-t. Specifications • Input Voltage: 3V - 30V • Input Current: 0 - 5.1A USB meter: Safety tester J7-t. DSC_5521 Official specifications: Input Voltage: 3V - 30V; Input current : 0 - 5.1A; Cumulative capacity range: 0-999.99 Ah