Integy #INTC23212 LiPo Voltage Checker/Warning Alarm
Integy's Lipo Battery Voltage Tester And Low Voltage Buzzer Alarm is a simple, compact 2-in-1 device that is perfect for your 1-8S batteries. Just plug the tester into your battery's balance connector and you'll know the pack voltage (both total pack and individual cell) instantly. The built-in low voltage alarm monitors the pack voltage and will automatically emit a buzzer sound and blink an LED light when the voltage drops below the threshold.