Cordless trimmer is only 4" (10 cm) long, 1" (2.5 cm) wide, and weighs just 3 oz (86 g) so it fits easily in the palm of your hand. Extremely quiet operation won't frighten dogs when trimming faces and ears. Includes #40 blade, two attachment combs, blade guard, cleaning brush, oil, and instructions. Runs on one "AA" battery (included).