Check the listing for details. 3 x 4-30V 2 Line Digital Voltage Meter Voltmeter Blue LCD Backlit Panel Monitor. Condition: New. Listed at 16.66 USD. SpecificationsShell material: ABS Type: digital voltage meter Working voltage: 4- 30V Measuring range: 4- 30V Voltage measurement accuracy: less than 0.3% Display: blue backlight digital LCD display Power consumption: 0.2W Measurement speed: more than 3 times/ sec Working environment: ambient temperature -10~ 65 ℃ Product color: Black Wire length: 20cm/7.87" Product size: 79 x 43 x 25mm/3.11 x 1.69 x 0.98" Net weight: 27g Product DescriptionFeatures:This product is a high precision voltage meter; when measuring high pressure, no need to connect power supply;With anti-collision shell design, dust-free workshop production, and original chip;With reversed connection protection and fine adjustment functions;Automatic decimal point shift: when voltage is less than 10V, it displays 2 digits; when voltage is over 10V, it displays 1 digit; Specifications:Shell material: ABSType: digital voltage meterWorking voltage: 4- 30VMeasuring range: 4- 30VVoltage measurement accuracy: less than 0.3%Display: blue backlight digital LCD displayPower consumption: 0.2WMeasurement speed: more than 3 times/ secWorking environment: ambient temperature -10~ 65 ℃Product color: BlackWire length: 20cm/7.87"Product size: 79 x 43 x 25mm/3.11 x 1.69 x 0.98"Net weight: 27gIncluded3 x Voltage Panel Monitor 2 x Lead Wires