bayite Pack of 5 Three-Wire Calibratable DC 0~30V Red Digital Mini Voltmeter Gauge Tester Mount Car Motorcycle Battery Monitor Volt Voltage Meter 0.36" Red LED Display Panel
 
Product Features
  

         
This is Three-Wire Voltmeter. Three-Wire connection enable the Voltage Test Rang from 0.00 to 30V. (Two-wire meters cannot measure the voltage that is below 3V);
         
Measurement Accuracy: 0.01(0.01 - 9.99V) / 0.1(10.0 - 30.0V); And the meter is CALIBRATABLE: The screw on the back is used to Calibrate the meter.
         
BRIGHT & NICE Reading: Display: Three 0.36" digital LED Tube; Display Color: Red;
         
Reverse Polarity Protection: The meter won't burn out if reverse polarity is applied, but the screen will display nothing
         
NOTE: When measured voltage is larger than 30V, the voltmeter will be damaged.