This compact voltage checker is designed for quickly monitoring 2S to 8S LiPo batteries through the balance port. The LCD display shows the total battery voltage along with the voltage of each individual cell. An audible alarm alerts you when a cell drops below the selected voltage level. The alarm is factory set at 3.3V per cell but can be adjusted from 2.7V to 3.8V. Its small size makes it easy to keep in an RC toolbox or leave connected during a run for real-time voltage monitoring.