Our Cordless Super Motor Clipper has a heavy-duty metal casing for hard-working durability. Its high-performance lithium battery giving 120 minutes of continuous runtime from a 3 hour fast charge, with guaranteed sustained power and speed, even at lower charge levels. The long-life, high-torque brushless motor gives consistent fast blade speed, even through longer, thicker hair. With precision engineered Japanese steel blades for easy, smooth cutting.