DROK Mini Voltmeter Five 0.36" Digital Voltage Monitor DC 0-4.3000V-33.000V Volt Tester Panel Meter Gauge Voltage Detector Tiny and compact with dimensions of about 48 mm x 29 mm x 21 mm and cutting Size of 45 5 mm x 26 5mm Five 0 36 inch It requires No isolated power supply but needs independent power supply of DC 3 5-30v Widely applied in car, Auto, motorcycle, automotive, vehicle, boat and battery monitor