Hello. Welcome to Futurlec. The electronic components Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help. PANEL METERS XL3BL-20V - Digital Blue LED Voltmeter - 0-20V DC Photograph Features High-Accuracy, Inexpensively Priced 3 Digits with 9mm Digit Height Ultrabright LED's Range: 0 - 19.9V Resolution: 0.1V Power Supply: 12Vdc Meter Dimensions (LxWxD): 48mm x 26mm x 22mm Panel Cutout (WxH): 47mm x 23mm Note: Requires a separate power supply