The Lithium Battery Tester with Low Voltage Alarm is a compact and portable device that allows you to monitor the status of your batteries. It features a voltage display for accurate battery testing and a low voltage alarm that can be adjusted to your desired . With this device, you can prevent damage caused by over-discharging or over-charging your batteries. Features -Color:Black -Material:Electronic components -Size:4.00X2.50X1.10cm/1.57X0.98X0.43in -Note: Used to detect - lithium batteries -Voltage detection accuracy: ± 0.01V -Group voltage display range: 0.5V~4.5V -Total voltage display range: 0.5V~36V - test mode Voltage range: 3.7V~30V -Low voltage buzzer alarm mode 2S- -Alarm voltage setting range: OFF~ 2.5V ~3.8V -Accurate measurement of battery capacity with voltage display. - low voltage alarm with adjustable . -Protection against damage caused by excessive discharge or charging. -Convenient and portable design, lightweight for easy carrying. -Audible and visual alerts through buzzer and led when voltage drops below set value. Package list: 1 x tester