Lipo Battery Voltage Tester Volt Meter Indicator Checker Dual Speaker 2in1 1 s-8 s Combination Low Voltage Buzzer AlarmFeatures:1.When the voltage is below the set value, the buzzer will sound red.2.Tension settings and save.3.For: 1 s-8 s Lipo / Li-Ion / LiMn / Li-Fe.4.Voltage display is accurate.5.Easy to install, DIY.Description:1.Be sure to attach the Lipoion connector to the connector of this Alarm, at the same time, the negative connectors of battery must connect to the negative connectors of the alarm.2.Quick test for your lipo before flight .3.Small device to check the battery voltage to avoid permanent damage .Specifications:Item Name: Combination Low Voltage Buzzer AlarmColor: RedVoltage detection precision: 01 vUnit voltage display range: 0.5-4.5 vTotal Voltage display Range: 0.5-36 v1 s test mode voltage range: 3.7-30 vLow voltage Buzzer alarm mode for 2-8 sAlarm set value range: OFF-2.7V-3.8VSize: 40 * 25 * 10mm (L * W * H)Net weight: 9gPackage information:Package size:65 * 50* 15mmPackage weight: 10gPoly bag packagePackage Included:1 x Combination Low Voltage Buzzer AlarmNote:Please allow error due to manual measurement, make sure you do not mind before you bid.