stepless speed adjustment for you get the speed you want. Safety Lock: Equipped with a safety lock function, press to lock and unlock the trigger easily, which can avoids unintended hurts by accidentally touching. LED Light & Indicator Light: Built-in LED working light, it will opens automatically when the trigger is pressed, and can provides illumination in dark spaces, more convenient to use. And with 3 power indicator lights to remaind you recharging in time. Cooling System: Reserved several ventilation cooling holes, efficient heat dissipation, will not hot for working long time. Wide Applications: Suitable for tightening screws in the home in all scenarios: such as the installation of lamps, household appliances, door locks and other disassembly. Specifications: Name: Electric Screwdriver Material: plastics Battery: no battery, 1pcs battery, 2pcs batteries (optional) Host: no battery 1pcs battery: 1 * 18V, 1300mAh lithium battery (included) 2pcs batteries: 2 * 18V, 1300mAh lithium battery (included) Torque: 45Nm Rotation speed: 405-1400rpm Item size: Host: 182 * 122 * 62mm / 7.17 * 4.80 * 2.44in Host with battery: 205 * 122 * 62mm / 8.07 * 4.80 * 2.44in Item weight: Host: 591g / 1.30lb 1pcs battery: 845g / 1.86lb 2pcs batteries: 1034g / 2.28lb Package size: 210 * 195 * 68mm / 8.27 * 7.68 * 2.68in Package weight: Host: 740g / 1.63lb 1pcs battery: 929g / 2.05lb 2pcs batteries: 1119g / 2.47lb Packing List (host): 1 * Electric Screwdriver OR 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