DROK 0.56 Inch DC 3-30V Digital Voltmeter Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter for Solar Battery Monitor Car Motor Panel Mount
Technical Parameters: Dimension: 48×29×22mm Cutting size: 46×27mm Measuring
voltage range: DC 3-30V Maximum input: DC 30V (if the input voltage is higher
than DC30V, the voltmeter will be burnt) Minimum input: DC 3V (if the input
voltage is lower than DC 3V, the value will be inaccurate or not displayed)
Measurement accuracy: Less than 10V, accurate to 0.01V; More than 10V,
accurate to 0.1V (allowable tolerance: 1% +/- 1 word) Display: 3 digit 0.56''
LED digital tube Font Color: Green Refresh rate: about 200mS No need power
supply Consuming current: less than 20mA (generally 5-15mA) Operating
temperature: -10°c-65°c Wire length: 20cm Reverse connection protection: YES
Method of wiring: Red wire: Positive Black wire: Negative Note: Please don't
use this meter in 24V battery because when the battery is full-charged, its
voltage will be about 30V (the max input volt for this meter), and we don't
suggest you use it in max volt of 30V. Package Includes: 1× 0.56'' Voltmeter
 
Product Features
  

         
High accuracy: Its decimal point will automatically move, and It also has a tiny potentiometer to do finer adjustments.
         
Easy to connect wires: It only has two wires, the red connects to positive and the black connects to negative.
         
Safe to use: with reversed connection protection, it will not be burnt even when connected reversely, but the screen display nothing.
         
Large screen and bright LED display, and it is well made, the strong plastic case prevents it from easily damaged by outer force.
         
It is perfect to monitor the condition of the battery, especially for solar projects, you can use it on your car, trailer, motor, etc.