DROK Digital Voltmeter AC 75V to 300V Micro AC 110V/220V Volt Panel Meter Voltage Tester Power Monitor Battery Gauge Detector LED Display for Auto Car Automotive Vehicle Motorcycle 0.56" three digital LED display, easy and convenient to see 65*38mm installing hole, compatible to 85L17 pointer table Super-thin outer case of merely 15mm thick, light, tiny and portable Buckle design suits for 1 to 3mm metal or plastic board Simple wiring connection requires merely two wires, the input and the output