Venoms Low Voltage Monitor is designed for quick and easy voltage checking on your 2S-8S LiPo batteries. This monitor provides easy-to-read visual readout and an audible alarm if one or more cells within the pack gets too low. The audible alarm is factory set at 3.3V, although is adjustable between 2.7-3.8V. Just plug the Low Voltage Monitor into the balance port on your 2S-8S battery, and a small LCD display will show the total pack voltage, as well as each individual cell voltage. Keep this handy tool in your field box for quick voltage checking.