ITEM NAME:DC LED Digital Display Voltage Meter Voltmeter Car Motor 0.4inch Green Description: - Measuring range: DC 2.4V--30V. - Input Voltage: 2.4V- 30V - Output Voltage: 2.4V- 30V - Measurement accuracy: Â ±3%. - Refresh rate: about 200mS / times. - Input impedance: > 100K. - Operating Temperature: -10Â °C - 65Â °C Specification: - Red wire: Measure Voltage +,(2.40-30V DC); - Black wire: Measure Voltage - - Display: 0.36 "digital tube. - Material: PCB - LED Color: Green - Size: Approx. 34.6x 20.2x 23mm/ 1.36x 0.79x 0.91inch Package Included: 1 Piece DC2.4-30V Digital Voltmeter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement..Input impedance: > 100K. - Display: 0.36 "digital tube. - LED Color: Green. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. - Material: PCB.