The Color Pro Cord/Cordless Rechargeable Beard Trimmer provides a color coded guide comb system that allows you too easily identify the correct comb size. The color coded guards (1/16" - 1/2") easily match the color coded guide on the trimmer. The trimmer contains self-sharpening precision blades that stay sharper longer and cord/cordless rechargeable technology that allows you to use with or without the trimmer plugged in. When the trimmer is fully charged, you can achieve up to 2 months between charges. This trimmer also has a charging indicator light that turns on when the trimmer is plugged in to let you know it is accepting a charge.