The gauge has BLUE LED’s 

– The LED’s have very low power draw
– Item is used to monitor battery voltage in a wide variety of applications

This listing includes:

– 1 x DUAL 12v Voltage Meter
– 1 x Mounting Plate
– 4 x Screws
– 4 x Spade Terminals

Specifications

Construction material: ABS + electrical components
Colour: Black
LED Colour: BLUE
Surface face size: 105mm x 43mm
Input voltage: 12-24 volts

Wiring Is Simple

Simply connect the positive terminal to your 12 volt power supply (battery positive terminal) and the negative terminal to earth.