The Makita XRJ01 has a Variable speed (0 - 3,000 strokes per minute) combined with a 1/2" stroke length for faster and more efficient cutting. Makita exclusive dual-position On/Off switch allows for either paddle or trigger switch operation. The "Tool-less" blade change system allows for faster blade installation and removal for increased productivity. It has a compact design (15-5/8" long and only 3.9 lbs., with battery) for convenient operation. Its built-in LED light illuminates the work area. Rubberized soft grip provides increased comfort on the job. It is ideal for a wide range of cutting applications. The LXT Lithium-ion battery and Rapid Optimum Charger produces 430% total lifetime work with 3x more cycles. LXT Lithium-ion battery provides longer run time, 5x lower self-discharge (for use any time) and 16 firm holding contact terminals (for constant high power). The 30-Minute Rapid Optimum Charger communicates with the battery's built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature. The 30-Minute Rapid Optimum Charger has a built-in fan to cool the battery to produce more lifetime work. The charger earned the ENERGY STAR label for meeting the strict energy-efficient guidelines set by the US. Environmental Protection Agency (EPA) and US Department of Energy (DOE).