LED Voltmeter KIT Photo - VM-2 If battery status is important, you need this kit. This kit uses 7 LED's to monitor 12v DC in 1v, 1/2v, or 1/4v steps. You can also build it to monitor 8v or 5v in 1/4v steps. Great for boats, motor homes, model planes or race car batteries.
All parts and instructions are included.
SIZE: 1.3" x 2.7".

Here is the instruction sheet for the VM kit.
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VM-2 Kit $7.95 Quantity:

VM-2 BUILT $15.95 Quantity:

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Rainbowkits - 121 E. North St. - New Ross IN 47968 - (765) 230-2301