Ego Power+ LM2123SP-2 21" Brushless Self Propelled Mower W/ Touch Drive Kit (4Ah+6Ah, 550W Charger)*The EGO POWER+ 21 Self Propelled Mower with Touch Drive delivers up to 6. 0 foot pounds of cutting torque that exceeds the power of gas. Features: Exceeds Power of Gas Equipped with a high efficiency brushless motor that delivers up to 6. 0 foot pounds of cutting torque to power through even the toughest grass TOUCH DRIVE Technology Engage the self propel function with the touch of your palm, change the speed at the same time with the scroll of a dial