the pressure added, the higher the speed is. 【Rotation Ways Adjustment & Safety Lock】: The control switch has three positions: forward, reverse, and lock.  A lockout mechanism allows the control switch to bring the motor to a complete stop before use. 【Comfortable Handle】: Ergonomic soft rubberized antislip handle design, easy to grip and comfortable to hold, practical and labor-saving.  【LED Indicator Light】: Equipped with an LED working light, it opens automatically when the trigger is pressed, and can provide illumination in dark spaces, more convenient to use. 【Efficient Heat Dissipation】: Reserved several ventilation cooling holes, efficient heat dissipation, will not be hot for working long time. 【Rechargeable Lithium Battery】: Adopts high capacity lithium battery with overcurrent, overvoltage, overcharge, overdischarge, and over temperature protections.  【Wide Applications】: Suitable for construction decoration, furniture installation and maintenance, DIY woodworking, furniture assembly, wood drilling, etc. Specifications: Name: Electric Screwdriver Set Material: metal'plastics Battery: 1pcs battery, 2pcs batteries (optional) 1pcs battery: 1 * 16.8V, 1300mAh lithium battery (included) 2pcs batteries: 2 * 16.8V, 1300mAh lithium battery (included) Item size: 150 * 58 * 212mm / 5.91 * 2.28 * 8.35in Item weight: 1pcs battery: 935g / 2.06lb 2pcs batteries: 1125g / 2.48lb Package size: 216 * 165 * 90mm / 8.50 * 6.50 * 3.54in Package weight: 1pcs battery: 1026g / 2.26lb 2pcs batteries: 1216g / 2.68lb Packing List (1pcs battery): 1 * Electric Screwdriver 1 * Battery 1 * Battery Adapter OR Packing List (2pcs batteries): 1 * Electric Screwdriver 2 * Battery 1 * Battery Adapter