1、Premium Components: The motor is in 4 pole 12 slot rotor design with strong torque and stable output power. ESC has high quality components to ensure efficient operation. The digital standard 2.2KG 3 wire servo is waterproof, high performance. 2、Aluminum Alloy Material: CNC machined, 6061 T6 aluminum front and rear covers. High purity, high temperature resistant copper coils effectively provide high efficiency. 3、Multiple Protection Functions: There are many useful protection features, such as low voltage cut off protection, overheating protection, throttling signal and loss protection. 4、Excellent Performance: High toughness stainless steel output shaft and high accuracy high quality bearings make the motor super durable. Excellent start, acceleration and linearity. 5、RC Programming Card: Equipped with ESC programming card, so DIY programming is possible, and the playability is higher, which is more interesting. Item Type: Brushless motor set Gross Weight: 184g / 6.5oz Motor Parameters Shell Material: Aluminum alloy Color: Red KV Value: 4500KV Product size: 24x35mm / 0.9x1.4in(excluding cables and shafts) Watts: 300 Maximum Speed: 60000 Maximum Amperage: 22A Shaft Diameter: 2mm / 0.1in Shaft Length: 12mm / 0.5in ESC Parameters Color: Red Material: Plastic, aluminum alloy Product size: 40x27x15mm /1.6x1.1x0.6in (without cable) Continuous Current: 25A Peak Current: 100A BCE Output: 5.8V 3A Applicable Batteries (batteries not included): 2-3 Cells Lipo or 4-9 Cell NiMh Servo Parameters Shell Material: Aluminum alloy Colour: Black Working Speed (4.8V): No load 0.10sec/60° Working Speed (6.0V): No load 0.08sec/60° Stall Torque (4.8V): 1.8kg.cm Stall Torque (6.0V): 2.2kg.cm Product size: 43x35x16mm / 1.7x1.4x0.7in Applicable: 1/16 1/18 RC car universal 1 x Motor 1 x ESC 1 x Manual 1 x Servo 1 x Servo Arm 4 x Screw 1 x Programming Card