Feature: 1. The set includes a 3900KV brushless motor, a 60A ESC, 25KG digital servo, programming card and heatsink, which is perfectly fit for the 1/8 1/10 RC car and is designed to provide both quality and performance at an affordable price. 2. The ESC features enhanced throttle response, excellent acceleration, strong breaks and throttle linearity. Supports program card to make adjustments. 3. High purity copper windings maximize efficiency, a precision-balanced rotor, smoothness for best reliability and maximum RPM. 4. Efficient and high-speed ball bearings, precision-engineered for maximum energy conversion. 5. Multiple protection features: Low voltage cut-off protection for lithium battery, over-heat protection, Throttle signal loss protection, motor blocked protection. Specification: Features: The set includes a 3900KV brushless motor, a 60A ESC, 25KG digital servo, programming card and heatsink, which is perfectly fit for the 1/8 1/10 RC car and is designed to provide both quality and performance at an affordable price. The ESC features enhanced throttle response, excellent acceleration, strong breaks and throttle linearity. Supports program card to make adjustments. High purity copper windings maximize efficiency, a precision-balanced rotor, smoothness for best reliability and maximum RPM. Efficient and high-speed ball bearings, precision-engineered for maximum energy conversion. Multiple protection features: Low voltage cut-off protection for lithium battery, over-heat protection, Throttle signal loss protection, motor blocked protection. Specifications: Name: 3650 RC Brushless Motor and Brushless 60A ESC 3650 RC Brushless Motor: KV(RPM/Volt): 2300KV/3100KV/3900KV4300KV Optional Watt: 850 Max RPM: 60000 Max Voltage: <8.4V Max Amps: 100A Rotor Poles: 4 Diameter: 36mm Length: 50mm Shaft Length: 15mm Shaft Diameter: 3.175mm Connector: 4.0mm Gold Weight: 165g Brushless 60A ESC: BEC: 5.8V/3A Continue Current: 60A Burst Current: 320A Battery: 2-3S Li-Po / 4-9S Ni-Mh Ni-Cd Power Supply Plugs: T Plug Male Motor Plugs: 4mm Banana Plug Female Size: 50 * 35 * 34mm(without cables) Weight: 82g (with Cables) Waterproof 25KG Servo: Item: 25KG Large Torque Digital Servo Operating Voltage: 4.8 ~ 7.4 DC Volts No Load Speed: 0.18sec/60°-0.14sec/60° Running Current: 140mA-200mA Peak Stall Torque: 23.5kg.cm-26.8kg.cm Stall Current: 2600mA±10% -3400mA±10% Dead Brand: 3mus Weight: 69g Motor Type: DC Motor Gear Type: Copper & Aluminum Working Frequence: 50-333Hz Operating Travel: 180deg（PWM 500-2500mus） OR 270deg（PWM 500-2500mus） Size: 40 x 20.5 x 40.5 mm Programming Card: Low Voltage Cut Off: 3.1V/Cell 2.8V/Cell 3.3V/Cell No Cut-off Start Mode: Medium, Soft, Strong Max Brake Force: 25%, 50%, 75%, 100% Max Reverse Force: 25%, 50%, 75%, 100% Neutral Range: 6%, 9%, 12%, Work State Package Information: Package Size: 12*8*4.5cm Package Weight: 419g Plastic Package Packing List: 1* 3900KV Brushless Motor 1* 60A ESC 1* Heatsink 1* 25KG Digital Servo 1* Programming Card Package List: 1* 3900KV Brushless Motor 1* 60A ESC 1* Heatsink 1* 25KG Digital Servo 1* Programming Card