... Low voltage Buzzer Alarm, Lipo battery voltage tester, LED 1-8S Name: 1S-8S Dual Speaker Lipo Alarm, ... 8S Voltage Tester, Lipo Checker, LED 1-8S LiPO Battery Voltage Tester/ Low Voltage Buzzer Lipo ... the set value, it will buzzer with red LED light, pre-set value 3.3V, Push key ... Buzzer Alarm, Lipo battery voltage tester, LED 1-8S LiPO Battery Voltage Tester, Low Voltage Buzzer