This nail drill features a lightweight battery power control box that can provide up to 8-10 hours of use per charge about 2 hours in either 110v or 220v. The control box has a LCD screen to show RPM and the battery power, variable speed dial, forward and reverse button. The control box with an external handpiece cradle. CONTENTS 1 Handpiece 1 Portable Control Box 24V/1A charging system Instructional manual Drill Bits Handpiece Seat Handpiece Holder Cnbbeautyco.com