10pcs Red DC2.5-30V LCD Display Digital Voltage Meter Waterproof Dustproof 0.4 Inch LED Digital Tube

Feature: Material: Plastic Display color: Red Dimensions: 40 x 25 x 23mm Cutting Size: 37 x 20mm Cable length: 20cm Measure range: DC 2.7-30.0V Maximum input: DC 30V Allowable error: 0.01V resolution below 10V, 0.1V resolution above 10V, 1% error tolerance (+/-1bit) Display: Three 0.40" LED digital tube Voltage: Red (DC 2.5-30.0V) Refresh rate: about 500mS Power supply: sharing power with measurement Current consumption: less than 20mA, generally 5-15mA Operating temperature: -10 V ~ 65 C Voltmeter with epoxy potting, Full waterproof design, Oil Pollution Prevention, Moistureproof, Shockproof, Dust-proof With Reverse polarity protection Application: Do not need power supply, can measure 2.5-30V directly If the input voltage is below 3.5V, the display brightness dims If the input voltage is below 2.5V, measuring inaccurate or no display When measure 10V below, accurate to 0.01V,display x.xx When measure 10V or more,accurate to 0.1V,display xx.x Note: Manual measuring, please allow 0-1cm error, thank you. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.. In actual use, due to fluctuations in power supply voltage and accuracy, fluctuations and differences of 1-2 bit may be encountered. This situation is normal, please understand. Package includes: 10 x Waterproof voltage meter