Practical Usb Detector LCD Lcd Display Multimeter Replacement Voltmeter
5,78 €
Press and hold the button for 0.5 seconds. Then press and hold the button for about 3 seconds to save. USB power can be used to detect the quality of the line. Supported connector: USB. Over-current protection and over-current protection: When the screen displays 0.00A, press and hold the button for about 3 seconds, there will be a flashing number.
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