The Lithium Battery Tester with Low Voltage Alarm is a reliable and user-friendly device for battery monitoring. It ensures that you have complete control over the working status of your batteries, preventing any potential damage. The compact and portable design allows you to carry it with ease, making it ideal for outdoor activities or professional use. The built-in buzzer and LED light provide a clear and visible alert when the voltage drops below the set value. With the easy-to-use button, you can adjust the voltage setting according to your needs, and the device will automatically save your preferred setting for future use. 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~4.5 -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 -A reliable device for monitoring and protecting battery power levels. -Provides complete control over the working status of the battery. -Compact and portable design suitable for outdoor or professional use. -Alerts users with a clear buzzer and led light when the voltage drops. -Allows for easy voltage adjustment with automatic saving of preferences. Package list: 1 x tester