The Kincrome 4V Lithium-Ion Touch Sensor Cordless Screwdriver comes with a 4V 1.3Ah inbuilt battery powering a high quality DC motor. This small and lightweight cordless screwdriver packs a serious punch, pushing out 7Nm of torque and a free spin speed of 180RPM. The screwdriver features an all new smart sensor switch which uses light/distance measuring electronics to power the tool on and off, requiring less movement and decreases user fatigue. This coupled with the ergonomic soft grip handle makes this a very comfortable screwdriver to work with, even for extended periods of time. The all metal gearbox is designed to last, combined with a battery that will hold its charge for up to 8 months and requires only 2-3 hours of charge time, you have a capable and reliable user friendly tool that is always ready to work.