The 3 kW brushless motor automatically adjusts in challenging scenarios, so its blades conquer thicker, taller, and wet grass with ease. All Electric: 3 kW brushless drive motor beats 160cc gas engine competitors Optimized Cutting: 21” deck with constant 17K FPM blade tip speed Better Than Gas Performance: 4x quieter at 60dB, 30% lighter with less vibration.