RioRand Digital LCD Display AC Voltmeter Gauge 12V Volt Panel Meter Voltage Continuous Tester 0-200mV/2V/20V/200V/500V (AC 20V) Powered by RioRand Advanced Technology Operating voltage: AC / DC 8 ~ 12V Measuring range AC 0~199.9mV/1.999V AC/19.99V/199.9V/500V, Optional Operating Current: &lt; 15mA Operating Current: &lt; 15mA ;Display: LCD, blue backlight, character height 20mm Dimensions: 79 x 43 x25 mm;Cutting size : 76 x 39 mm