Sierra EA01090 Digital Voltmeter w Graph Display Sierra digital voltmeter with a digital LED 3-digit display. This voltmeter has a compact size and can fit a standard 1-18 cutout. It has low current consumption and is self-powered from the DC voltage being measured. Features a battery level display around the circumference of the display and a floating decimal point for better resolution below 10V. Features Compact size - fits a standard 1-18 cutout Digital LED 3-digit display Self-powered from