SODIAL(R) 2S-6S 2-6S RC Lipo Battery Low Voltage Alarm Indicator Meter Checker Tester Test For RC model battery diagnosis and measurement use. Auto display the voltage with Arabic numberals It allows you to learn the working state of your battery, so your battery will not overcharge and over discharge or damage Used for 2S-6S(7.4V~11.1V)Li-Po Battery Little current consume