Features 1、Low Voltage Alarm: When the voltage is lower than the set value, the buzzer will sound and the red LED light will flash to remind you that the voltage is too low. 2、Monitor Battery Status: This alarm can let you know the working status of your battery anytime and anywhere, so that your battery will not be damaged due to over discharge or over charge. 3、ABS Shell: The shell of our buzzer is made of ABS material, which has good wear resistance, anti drop and prolongs the service life. 4、Strong Functions: The factory default setting value of this voltage detector is 3.3V. Press the button to change the voltage setting value and save it automatically. It also supports reverse connection protection. 5、Main Application: The voltage display is used for lithium battery detection from 1S to 8S, and automatically detects the voltage and total voltage of each cell of the lithium battery. Specification Item Type: Lithium Battery Low Voltage Alarm Material: ABS Uses: Used for 1S-8S lithium battery detection Voltage Detection Accuracy: ± 0.01V. Group Voltage Display Range: 0.5V-4.5V Total Voltage Display Range: 0.5V-36V 1S Test Mode Voltage Range: 3.7V-30V Low Voltage Buzzer Alarm Mode: 2S - 8S Alarm Voltage Setting Range: OFF-2.5-3.8V Package List 10 x Lithium Battery Low Voltage Alarm