Features: 1. The minimum mA and mV levels can be displayed (200V range cannot display mV levels) 2. Lens silk screen, Chinese and English, international common unit symbols, clear at a glance, 3. The on-board simulator can be automatically reset to zero (30153 series current cannot be automatically reset to zero, occasionally the customer needs to manually reset to zero if it does not return to zero) Specifications: Working voltage: DC4~30V (recommended 5~12V) Measuring current range: DC10A (display mode 0.000A~10.00A) Voltage measurement range: for DC 100V (display mode 0.000V~10.00V~100.0V) for DC 200V (display mode 0.00V~10.00V~100.0V) Refresh time: 300ms Display mode: 0.28 inch 4-digit LED Product size: 60.0028.6022.00mm Hole size: 57.526.0mm Product weight: 25g Lead definition: Thin red line: positive-pole of instrument power supply Thin black wire: the negative electrode of the power supply of the instrument is also a common ground wire Thin yellow wire: measuring voltage positive Thick red line: the positive-pole of the current test, in series with the negative-pole of the load Thick black wire: the negative-pole of the current test, connected to the negative-pole of the load power supply Package included: 1 * Voltmeter Ammeter 2 * Leads