10Pcs White 0.28 Inch 3.0V-30V Mini Digital Voltmeter Voltage Tester MeterFeature:Detection voltage: DC3.0V ~ 30VWorking current: <30mADisplay: 0.28 inch LEDDimensions: 31 × 12.0 × 9mm (length x width x height)Installation hole: 23 × 10 mmMeasurement rate: ≥200mS \/ timesAccuracy: 1% (+\/- 1 word)Color: White: 3.0V - 30VPackage included:10 x White Mini Digital Voltmeter