Sensor-controlled Brushless Motor. Dimensions: 58 mm (L) x 36 mm (Ø). Motor type: Brushless. No-load RPM per volt: 3370 kV. A brushless motor is an electric motor without brushes, which offers higher efficiency, less wear, and lower weight compared to brushed motors. Sensor-controlled brushless motors have an additional sensor cable, allowing for precise control and smooth starts. Additionally, they can achieve higher RPMs compared to sensorless motors.