DescriptionBrand Name : EARUELETRICOrigin : Mainland ChinaDIY Supplies : ELECTRICALCertification : CEDisplay Type : Digital OnlyDimensions : 46 x 29 x 22 mmPower Supply : DCAccuracy Class : 1%Unit Type : piecePackage Weight : 0.06kg (0.13lb.)Package Size : 10cm x 5cm x 2cm (3.94in x 1.97in x 0.79in)Measuring Range : DC 0-30V/0-100VIf you need waterproof meters, please click here Hot Mini voltmeter Tester Digital Voltage Test Battery DC 0-30V 0-100V 3 Wires Red Green Blue for Auto Car LED Display GaugeSize: approx 46 x 29 x 22 mmPrecision: 1%Display Mode: 3 digitsRange: DC 0V-30V/DC 0V-100VFeed input range: DC 4,5-30V/100VOperating Current: less than 20mADisplay color: redStorage temperature: + -10C has 65CThe black wire connects the common negative, the red wire connects the positive power, the white wire connects the positive input of the detention1 x Mini voltmeter