Allows for display and determination of battery status using a traffic light system. Green: strong = >12.6 V, Yellow: charge = 12.2 V - 12.6 V, Red: weak = <12.2 V Flashes every 5 seconds to reduce power consumption. For use with 12 V batteries (no lithium batteries). Connection type Ring terminals Article type Main color black Charging cable length 500 mm Secondary color red