It is a Digital Meter/High-precision Voltmeter/Voltage Tester, Power Supply: DC 3.5~30V (separate power supply), Measure Range: DC 0~4.3000V~33.000V ( 4.3V below, accuracy automatically, Display: five 0.36" digital LED tube, It has small size, high efficiency, long term stable and reliable quality,easy installation and use. Application: Suitable for car,auto, motorcycle, automotive, vehicle, boat and battery monitor

• Dimensions:48mm x 29mm x 21mm
• Cutting Size: 45.5mm x 26.5mm
• Power Supply: DC 3.5~30V (separate power supply)
• Measure Range: DC 0~4.3000V~33.000V ( 4.3V below, accuracy automatically change, the maximum resolution is 0.1mV )
• Display: five 0.36" digital LED tube
• Display Color: Yellow
• Refresh Rate: >3 times per second
• Accuracy: ± (0.03 % + 2 digits)  ( normal error less than 2mv, maximum 10mv )
• Working Temperature: -10 °c~ 65 °c
• Temperature Coefficient: less than 25PPM / °c
• Application: Suitable for car,auto, motorcycle, automotive, vehicle, boat and battery monitor

• Red+ : Power supply + (DC 3.5~30V)
• Black- : Power supply -
• Red VIN+ : Measurement signal +, (0-4.3000V-33.000V, automatically adapt )
• Black VIN- : Measurement signal -

• 1 x Digital Voltmeter ( Digital Tester )