1、TRUE MEASUREMENT: Users can measure the corresponding parameters according to the actual situation, current voltage and battery capacity percentage. 2、SAFETY USE: With low voltage alarm, which is adjustable, could automatic shutdown, reduce consumption, with discharge protection, extends battery life. 3、WIDE COMPATIBILITY: Support lithium battery, acid battery, lithium iron phosphate battery, and can also be used for other types of batteries and power supplies, also support multiple batteries in series. 4、DIGITAL DISPLAY: Adopt high brightness digital tube display, the parameters can be viewed clearly and intuitively. 5、WIDE APPLICATION: This test module is widely used in automobile, mobile equipment, ships, outdoor equipment and other applications.