Efficient setting key: the multifunctional battery indicator has a new design of the front setting button, and have several functions: cycle voltmeter/battery percentage, turn on the backlight, black, sleep mode, battery type selection etc.Practical designs: the battery capacity voltage indicators are designed with switched function button, you can press to check the battery capacity or real-time voltage and turn off, with alarm design, the battery meter display will flash when the battery capacity is lowLCD display: the battery gauge indicators come with PVC waterproof screen protector with bright back-light, which makes you can read the results on the clear LCG display from different angles, low working power consumption and the max is 5 mAFit different battery: the battery gauge indicators are compatible with 12V/ 24V/ 36V/ 48V/ 60V/ 72V/ 84V acid battery, ternary lithium battery, polymer lithium-ion battery, 3 -15 series lithium ion battery, storage battery, water battery and moreW