2PCS DC 5V-100V Digital Volt Gauge Amp Meter LED Display Voltage Current Monitor
The compact device is simple to install—just drill a 30mm hole and connect the labeled wires. A built-in smart chip protects against short circuits, overheating, overcurrent, and reverse wiring. Display Digit LED.
4V-100V Waterproof Car Battery Meter Voltmeter LED Digital Display Voltage Gauge
It’s easy to read in any lighting condition. The drill hole size is 1.18in/3cm, making installation quick and easy without occupying much room. In this case, the display will not show, but the device will remain safe and intact.