The LoPROFX trimmers feature an Ultra-low profile metal shield cover and ergonomic grip housing. It’s powered by a high-performance brushless 6,800 RPM motor with a high-capacity 3,300 mAh lithium-ion battery. The design and power is completed by arming the LoPROFX with a low-temperature blade. LoPROFX, the perfect machine for overall feel, power, and cutting performance. Ultra-Low Profile Metal Shield Cover. High-Performance / High-Torque Brushless Motor. Lithium Ion Battery with 2+ Hour Runtime.