This product has the function of reverse connection for protection Specifications: Measuring range: for DC 0V-100V Display method: 0.000-99.99-100.0 Operating voltage: 4-30V (recommended range 5V-12V) Refresh rate: 3 times / second Test accuracy: 0.3% error = span X0.003) for Head resistance: 130K Opening size: 57.8*26mm for Shell size: 60*29*21.5mm Display window size: 49*18mm Package include: 1pcs Digital Voltmeter
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