Feature: 1. 4 Pole 12 Slot Hi-torque Motor Design. 2. High Quality: CNC Machined 6061 T6 Billet Aluminum Heatsink Can, High Purity Copper Windings Maximizes Efficiency, High RPM ABEC5 Oversized Bearings. 3. Universal fit, for all 1/12 2S Remote Control car and 3S racing car. 4. Precision balanced rotor,smoothness for best reliability and maximum RPM. 5. Stator - Super Thin (0.35mm) Laminations,Removable/Replaceable rotor,Precision Engineered for maximum Energy Conversion. Specification: Features: 4 Pole 12 Slot Hi-torque Motor Design. High Quality: CNC Machined 6061 T6 Billet Aluminum Heatsink Can, High Purity Copper Windings Maximizes Efficiency, High RPM ABEC5 Oversized Bearings. Universal fit, for all 1/12 2S Remote Control car and 3S racing car. Precision balanced rotor,smoothness for best reliability and maximum RPM. Stator - Super Thin (0.35mm) Laminations. Removable/Replaceable rotor. Precision Engineered for maximum Energy Conversion. Specifications: Series: KK Name: S2845 Brushless Motor Color: red KV(RPM/Volt): 2800KV/3700KV/4400KV/5900KV optional Watt:800 Max RPM: 50000 Rotor poles: 4 Diameter: 28mm Length: 45mm Shaft: 3.175mm Shaft length: 15mm Connector: 3.5mm gold Weight:118g Note: Only the above package content, other products are not included. 1.Due to the difference between different monitors,the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Due to the manual measurement and different measurement methods, please allow 1-3mm deviation.Thanks 35A ESC: Highest quality components to ensure high efficiency operation Excellent start-up, acceleration and linearity features. Plenty of programmable items, suitable for various of chassis's, tires and racing tracks. Multiple protection features: Low voltage cut-off protection / Over-heat protection / Throttle signal loss protection. Internal timing can be changed easily to make the ESC suitable for various of motors. Specifications of ESC: Constant current: 35A Burst current: 120A (10S) Power supply: 2-3S LiPo battery / 4-6S NiMh battery BEC: linear switch 5V 1A Package Information: Package Size: 12*8*1.5cm Package Weight: 166g General Box Package Packing List: 1* 5900KV Brushless Motor 1* 35A ESC Package List: 1* 5900KV Brushless Motor 1* 35A ESC