ITEM NAME:Professional BX100 1-8S Lipo Battery Voltage Tester Low Voltage Buzzer Alarm/ Description: BX100 1-8S Lipo Battery Voltage Tester/ Low Voltage Buzzer Alarm/ Battery Voltage Checker with Dual Speakers Sharp backlit LCD screen, applicable under poor light.Alarm set value range: OFF-2.7-3.8V. Suitable for various kinds of RC battery, such as LiPo/Li-ion/Li-Mn/Li-Fe Battery. Sharp backlit LCD screen, applicable under poor light condition.