Customers say this voltmeter is easy to read and install, with a clear display showing both voltage and battery percentage. Many reviews mention its compact size and bright screen. The device helps users track battery charge levels at a glance. While most find it straightforward to use, some note the connecting wires are quite short. Users appreciate the simple interface and backlit display, though a few mention the control button is small. Reviews indicate it works well for monitoring various battery setups, with the percentage display being particularly valued.