Variable-speed dial adjusts belt speed between 1000 and 2300 feet per minute Features two sanding arms for access to extremely tight spaces and awkward angles Belt pivots up to 120 degrees to meet the needs of any project Brushless motor provides better performance, a longer lifespan, and less maintenance than brushed alternatives 2.0 amp-hour lithium-ion battery with onboard LED charge gauge delivers consistent power at any charge level, and is compatible with the entire WEN 20V Max Cordless Power Tool series