Our BOOST+ Gold Professional Clipper has a heavy-duty metal casing for hard-working durability. Its high-performance lithium-ion battery gives 2 hours of continuous runtime from a 4-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 DLC blades for easy, smooth cutting with lower blade temperatures. The handle is coated with a new diamond-textured rubber for even more comfort and control in use.