The PenDriver ESD is USB powered and is shipped out in only one user mode,Smart Manual Mode with 4 preset torque limits, in this mode the PenDriver determines orientation by the amount of pressure applied to the screw. Traditionally a screw is loosened by applying force and turning. With the PenDriver's Manual Mode a greater amount of force is applied and a screw is loosened. To fastening a screw a lower force is applied. Using Smart Manual Mode eliminates fatigue and improves productivity. Torque Rating & RPM Via USB 5v: 142 RPM, ± 0.02Nm to 0.25Nm Torque Rating & RPM Via PenDriver USB Power Supply: 176 RPM, ± 0.02Nm to 0.3Nm Mode: Smart Manual Mode Package Includes: PenDriver ESD White Plastic 5 Bit Dock PenDriver ESD White Clam Housing 6 x 4mm hex bit set: Philips #00, Philips #000, Slotted 1.5mm, Slotted 1.7mm, Pentalobe 0.8 and Pentalobe 1.2 1 x 1m USB to 2.5mm Jack User ManualgTool