DROK Digital Voltmeter Panel DC 0-199.9 V LCD High Voltage Measurement Volt Meters Range: DC 0 to 199.9V ( Need Extra Power Supply ) Power Supply: AC or DC 9-12V Backlight colors: Blue Resolution: 0.5% +/- 2 digit Dimensions: 70x40x22 mm; Cutting Size: 68x38 mm