Small and Light LiPo Low Voltage Alarm. Simply plugs into the battery's balance lead to detect low voltage on individual cells. A loud alarm will sound and LED will change from Green to Red if any individual cell drops to 3.3 volts or lower.
Specs:
Battery Cell Range: 2S-4S
Size: 38mm x 25mm x 11mm
Weight: 7g
Voltage Accuracy: 0.03V
Low Voltage Alarm Threshold: 3.3V (per cell)