Description This LED Battery Indicator monitors the charge status of the battery. With it you will know the battery level and decide when to charge your battery operated equipment. With a shell, easy to use stand-alone or embedded in the panel on the product. Features - Color: Black- Material: Plastic- Size: 4.8 x 2.8 x 2cm- Works for 12V Lead-acid battery, NI-MH Battery, Lithium Battery and more.- 4 segments LED indicator, 10% capacity resolution. Accurately measure battery capacity.- Black wire connect to negative, red to positive.- With a shell, easy to use stand-alone or embedded in the panel on the product.- Usage: Connected the display panel positive and negative terminals to the tested battery positive and negative side, then the digital tube will show the battery level.Battery capacity display parameter:Battery voltage >11.2V, 1 Grid LightBattery voltage >12V, 2 Grids LightBattery voltage >12.5V, 3 Grids LightBattery voltage >13.3V, 4 Grids LightPacking list: 1 x 12V LED Battery Indicator Meter Gauge for Lead-Acid Battery NI-MH Battery Lithium Battery