The black line connected to the public negative electrode, red line connected to positive pole of power supply, yellow line connected to positive pole of tested power supply
Material: Plastic Shell
Display Digit: 3
Measuring Range: DC 0-30V
Working voltage: 4-30V
Display Size: Approx 2.3cm x 1.2cm / 0.91" x 0.47"
Overall Dimension: Approx 3.4cm x 2.2cm x 2cm / 1.34" x 0.87" x 0.79" (L x W x H)
Cable Length: Approx 20cm / 7.87"