The Hobbywing EZRun Max8 G2 Waterproof Brushless ESC and Motor Combo includes the awesome 4278SD G2 – 2250kV sensored motor to deliver high torque, fast acceleration response and stable power output for 1/8 scale applications. Special technology for temperature control is implemented by the motor and provides less heat more efficiently (efficiency rate of up to 90%). The EZRun Max8 G2 Waterproof Brushless ESC, with installed XT90 connectors is built with high quality components and loaded with cutting edge firmware. Sensored or Sensorless Brushless Operation. 4 pole rotor for high torque, fast acceleration response and stable power output. Special technology for temperature control implemented by this motor guarantees less heat more efficiency (efficiency rate of up to 90%). CNC machined aluminum housing, high purity copper windings, advanced rotor structure, high-quality alloy steel output shaft, high-precision bearings for high durability and smoothness. Rebuild-able design (partially rebuild-able) for routine maintenance effectively prolongs the motor life and raises the motor efficiency. This EZRUN motor is a perfect match for the HOBBYWING EZRUN MAX8 G2 ESC. Motor Type: Sensored or Sensorless Brushless. Applications: 1/8 Touring Car, Buggy, Truggy, Monster Truck. Brushless Motor Limit 4S LiPo/12-Cell NiMH: 3000 (4274 size motor). Brushless Motor Limit 6S LiPo/18-Cell NiMH: 2400 (4274 size motor). LiPo/NiMH Cells: 3-6S LiPo / 9-18 Cell NiMH. BEC Output: 6V/7.4V/8.4V Switchable, Continuous current of 10A (Switch mode BEC). Cooling Fan: Powered by the stable BEC voltage of 6V/7.2V. Size (LxWxH): 60x48x40.5mm. Programming Port: Fan/PRG Port. Motor D & L (mm): D=42, L=78. Shaft D & L of the projecting part (mm): D=5, L=18.5. EZRun Max8 ESC with XT90 connectors. Accessories (double sided tape, etc). 4278SD – 2250kV Brushless sensored motor.