Colorful LED Display: Special design, upper row of battery capacity monitor uses 8 color (2 red and 6 green) bars to display the battery power. Lower row displays the real-time data of voltage. Let you know the condition of the vehicle battery in real time Waterproof Design: Compact shell, fully enclosed design on the back, battery capacity monitor lcd indicator can be used in rainy days without worrying about damage to the device Widely Application: Battery Indicator can be used for 12V-72V lithium battery packs, lead-acid batteries, car batteries, and electric vehicle batteries. But do not use battery capacity voltage indicator on trucks, cranes, forklifts and other high-power and high-load equipment.