Double Button Design for Quick Setup: The GY-6GS Battery Power LCD Display Voltage Meter is designed with user convenience in mind. Its intuitive double button design allows you to set up the device in just a few seconds, making it accessible for everyone. Energy-Efficient Power Switch: This voltage meter includes a practical power switch, enabling you to turn off the device completely when not in use. This feature ensures there is no power consumption, helping to conserve energy and extend battery life. Accurate Battery Monitoring: Stay informed about your battery's status with precise readings of battery power percentage and voltage. The GY-6GS provides an intuitive display that allows you to easily monitor and manage your battery usage. Smart Light Alarm Function: To prevent unexpected power depletion, the device features a white backlight alarm. When the battery power falls to 20% or below, the backlight flashes to alert you, ensuring you have ample time to recharge or replace the battery. Versatile Battery Compatibility: The GY-6GS is compatible with a wide range of battery types, including lead acid, lithium, and iron lithium batteries. You can easily configure the device to match your specific battery type, offering flexibility and adaptability for various applications.