1、Multiple Modes: Users can toggle the display between voltmeter and battery percentage at the push of a button, also features backlight, sleep mode, and more. 2、Waterproof: The surface of the battery meter has good water resistance, can be used in outdoor environments, and has reliable and stable working performance. 3、Good Safety: The battery meter has a built in power cord, which is easy to connect, and has a reverse connection protection design, which will not burn when reversed. 4、ABS Housing: The shell of the battery meter is made of environmentally friendly ABS material, which has no peculiar smell, no pollution to the environment, and is sturdy and durable. 5、Small Volume: The battery meter is small in size, light in weight, easy to carry, can be installed quickly, and is easy to use.