If battery status is important, you need this kit. This kit uses 7 LEDs; monitor 12v DC, 1v, 1/2v, or 1/4v steps. Monitor 8v or 5 v in 1/4 v steps. Great for boats, motor homes, model planes or racing car ni-cads. All parts and instruction are included. Size: 1.3" x 2.7".
NOTE: Assembly with a soldering iron is required (solder and soldering iron are not included).