Features Monitor Battery Status This alarm can let you know the operating status of your battery anytime and anywhere, so that your battery is not damaged by over-discharge or overcharging. 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 automatically. It also supports reverse connection protection. Main application: the voltage indicator is used to detect lithium batteries from 1S to 8S, and automatically detects the voltage and total voltage of each cell of the lithium battery. Low Voltage Alarm When the voltage is below the set value, the buzzer will sound and the red LED light will flash to remind you that the voltage is too low. ABS shell: the shell of our buzzer is made of ABS material, which has good wear resistance, is drip-proof and extends the service life. Specification: Item Type: Low Voltage Lithium Battery Alarm Material: ABS Usage: Used to detect 1S-8S lithium batteries Voltage detection accuracy: ±0.01V Display range of group voltage: 0.5V to 4.5V. Total voltage display range: 0.5V-36V Voltage range in 1S test mode: 3.7 V to 30 V. 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. Package List 10 x Lithium Battery Low Voltage Alarm