USB 3 Voltmeter Current Meter 0-3A 4-30V Display Current Voltage Extension Board The contacts are practically marked

The contacts are practically marked with the corresponding function

the sensor measures different gas concentrations and provides indoor air quality (IAQ index

For making your own cables

DIY voltage regulators

0 or above

USB 3 Voltmeter Current Meter 0-3A 4-30V Display Current Voltage Extension Board The contacts are practically markedThe USB tester can be used to test the voltage current. The tester uses high definition IPS color liquid crystal display, multi directional connector, high brightness and long service life. Current and voltage data can be displayed simultaneously for easy display. It can also detect the voltage and current of various power supply outputs, as well as the quality of USB data cables. Real time detection of device charging status, voltage, current, power