Effortlessly transition from corded to cordless without compromising performance. Balanced with a unique ergonomic battery for optimum performance and handling. The RTSC 400 provides the same functionality of its corded counterpart but with hybrid power options - use it cordless or corded (adapter for corded use sold separately). The 18-volt Ergo battery provides up to 30 minutes of runtime at full power. Work virtually dust-free with Jetstream® dust extraction technology to ensure a cleaner surface and work environment with longer abrasive life for better sanding results. Integrated, removable Protector provides protection to abutting surfaces as well as the pad for up close sanding applications.