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product description: The voltmeter with 0.56-inch digital display£¬ external dimensions compatible with 5135 digital panel table. The operating voltage range (ie range) is wide and can operate in DC 6~30V range. Applicable to a variety of DC voltage measurement purposes. Technical Parameters: Dimensions: 79x43x14mm Opening size: 75mm x 39.5mm Range: DC 0~100V Display: three 0.56" LED digital tube Display color: red Refresh speed: about 500ms / time Maximum input: <1.2 times the range