CTEK’s comfort indicator eyelet is a practical combination of quick connector and an indicator. Easily connects to batteries which are often difficult to gain access to and is great for multi-vehicle use. The indicator shows the battery"s charge level simply and clearly with the 3 different colored LEDs. Red indicates a charge less than 60 percentage, yellow is a charge above 60 percentage but fewer than 80 percentage and the green light indicates a charge over 80 percentage. The comfort indicator eyelet comes standard with an end cap attached to ensure the connection stays in good condition while not in use. All CTEK products are delivered with a 5 year limited warranty from the original purchase date. The limited warranty is not transferable and only covers manufacturing faults or material defects. Warranty is only honored if product and original receipt are returned together to the retailer. Warranty is void if the battery charger has been opened, handled carelessly or repaired by anyone other than a CTEK Power Inc. or its authorized representatives.