This is a 3/4 bit high precision USB tester for voltage and current detection.
0.36” 4-Digit 3-Wire Blue LED Display 0-100V 20mA Voltmeter
0.36” 4-Digit 3-Wire Green LED Display 0-100V 20mA Voltmeter
0.36” 4-Digit 3-Wire Red LED Display 0-100V 20mA Voltmeter