Feature: 1. Compatible: Built in switch mode BEC 5.8V 5A, compatible with high torsion and high voltage servos, with strong current resistance, easy to program and compatible with pocket program cards for all 1/10 RC brushless cars. 2. 4 Poles Rotor: 4 poles 12 slot high torsion rotor design, low friction, low noise, high accuracy, with strong torsion and stable output power. 3. CNC Shell: High hardness aluminum CNC shell, high temperature resistant copper coil 0.35mm thickness silicon steel sheet, high magnetic permeability, high silicon content, good insulation and heat resistance. 4. Multiple Protection Functions: Lithium battery or nickel battery low voltage cut off protection, throttle signal loss protection, motor blocking protection, ESC overheating protection, motor built in temperature sensor and interface, with ESC can achieve motor overheating protection function. 5. Super Durability: Explosion proof rotor, high toughness stainless steel output shaft, high precise premium bearings to create the motor super durability. 6. Detachable Structure: The detachable structure is designed for easy cleaning and maintenance, effectively extending motor life and improving work efficiency. 7. Universal Installation: 80A brushless ESC, waterproof and dustproof, XT60 to T plug connector, 3.175mm out of the shaft, M3 screws a variety of mounting methods, good installation. Specification: Item Type: RC Brushless Motor ESC Kit Material: Aluminum Alloy, Copper, Plastic Gross Weight: 317g / 11.2oz Color: Black Red Model: F540 KV (RPM/V): 3100KV Output Power: 820W Maximum Voltage: < 17V Maximum Current: 48A Motor Pole Number: 4 IO: 1.6 A Resistance (Ω): 0.0324 Maximum RPM: 50000 Motor Diameter: Approx.35.8mm / 1.4in Motor Length: Approx.50mm / 2.0in(excluding shaft) Shaft Diameter: Approx.3.175mm / 0.1in Shaft Lngth: Approx.15mm / 0.6in 45A ESC: Continuous Current: 45A Maximum Current: 240A Motor Type: sensorless brushless motor Resistance: 0.0014ohm Battery: 2-3S lithium battery, 4-9S NIMH BEC Output: 5.8V 5V(switching mode) Product Size: Approx.50 x 35 x 34mm / 2.0 x 1.4 x 1.3in Plug Type: XT60 to T connector Suitable: for all 1/10 brushless cars. Package List: 1 x F540 Sensorless Brushless Motor 1 x 45A ESC 1 x XT60 to T Male Plug 4 x Screw 2 x Manual 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.