The EGO POWER+ 21" Select Cut Self-Propelled Mower delivers performance that exceeds the power of gas. The first cordless lawn mower to have an interchangeable multi-blade cutting system. Customize your cut™ with three interchangeable lower blades to choose from; the Mulching Blade, High Lift Bagging Blade and Extended Runtime Blade. The Mulching Blade comes installed on the mower and is ideal for weekly mulching, giving you the mulching quality you would expected from a high-end gas lawn mower. The High Lift Bagging Blade provides extra suction ideal for bagging, leaving your yard free of clippings. The Extended Runtime Blade provides an optimal balance of cut quality and runtime for all around performance. All three blades can be used interchangeably based on your desired cut. The EGO Upper Blade is used in combination with the lower blade chosen to slice the grass into fine fragments; this greatly enhances cutting performance with all grass types. EGO’s Self-Propelled Touch Drive™ Technology comes from years of research and development. Touch Drive™ Technology puts complete control of the self-propelled system in the palm of your hands by using pressure to engage the system. Easily control the variable speed with a dial positioned at your fingertips for safe and convenient operation. EGO harnesses the power of the industry’s most advanced 56 Volt 7.5 Ah ARC Lithium™ Fuel Gauge battery (shipped separately) by delivering over 60 minutes of cutting time on a single charge.