Feature: 1. 4 Pole Rotor Design: 4 pole explosion proof rotor makes the motor have strong torque and stable output power. Small friction, low noise. High toughness stainless steel bearing shaft to build the motor super durability. 2. High Heat Proof: The motor is equipped with high hardness aluminum CNC shell, high temperature resistant copper coil, 0.2mm thickness silicon steel sheet, high permeability, high silicon content, good insulation and heat resistance. Motor built in temperature sensor and interface, with ESC, can realize the motor overheating protection function. 3. Detachable Motor: The detachable structure is designed for easy cleaning and maintenance, effectively extending the life of the motor and improving efficiency. 4. Waterproof and Dustproof ESC: The ESC is weatherproof, waterproof and dustproof, designed for RC model cars, with excellent starting, acceleration and linearity functions. 5. Wide Compatibility: This motor and ESC kit is for sensorless brushless motors. It has high current proof, excellent heat dissipation, built in switch mode, switchable 6.1V 5A mode or 7.4V 5A mode, compatible with high torque and high voltage servo. 6. Multiple Protection Functions: Low voltage cut off protection for lithium or nickel batteries, ESC overheating protection, motor overheating protection, throttle signal loss protection, motor blocking protection, easy programming, and compatible with pocket sized program cards. Specification: Item Type: Brushless Motor ESC Combo Material: Aluminum, copper, steel, plastic Weight: Approx. 697g/24.59oz Motor Diameter: 40mm/1.57in 42mm/1.65in Motor Length: 74mm/2.91in (without shaft) Shaft Diameter: 5mm/0.20in Shaft Length: 18mm/0.71in Gold Plated Joint: 6.5mm/0.26in ESC Size: 57.5x45x37mm/2.26x1.77x1.46in(without cable) Color: Black and red Model: 4274 KV (RPM Volt): 1850KV Output Power: 2800W Maximum Voltage: <26V Maximum Current: 108A Number of Motor Poles: 4 IO: 1.6A Resistance (Ω): 0.0076 Maximum Speed: 50000 120A ESC: Continuous Current Surge Current: 120A 860A Motor Type: Non inductive brushless motor 4S Lipo or 12S NiMH: Flat Car: 40xx motor KV＜3000 Off Road Truck: 40xx motor KV<2500 6S Lipo or 18S NiMH: Roadster: 40xx motor KV＜2500 Off Road Truck: 40xx motor KV<2000 Internal Resistance: 0.00035ohm Battery: 3-6S Lipo 9-18S NiMH BEC Output: 6.1V 5A or 7.4V 5A (switching mode) Application: Suitable for 1/8 RC cars (e.g. for Traxxas for Wltoys for HSP, etc.) . Package List: 1 x 4274 Brushless Motor1 x 120A ESC2 x Instruction Note: 1. Due to manual measurement, please allow 1‑3mm error, thank you! 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Please uninstall the cooling fan before using this ESC in water: clean and dry after use to avoid rusting of the connector.