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
The PM-23 is a blue 0.36" digital display DC 0-100V Voltmeter with 4 Digit, 3-wires.