Feature:1. Has many protective measures: lowvoltage cutting protection, overheating protection, throttle signal loss protection2. Able to get the maximum energy to convert the precision balanced rotor for best reliability and maximum RPM3. Has high purity copper winding can maximize efficiency with 4 pole 12 slot high torque motor design 3.175mm shaft diameter , and maximum nmrpm up to 25kg.cm (7.4V)4. CNC aluminum medium housing enhances heat dissipation and ensures that servo motors can work properly5. Metal gears adopts hard anodized treatment to provide higher precision and longer service lifeSpecification:Item Type: 3650 3900KV Motor SetMaterial: Aluminum alloy + plasticApplication: 1/10RC Remote Control Car Motor parameters:Power: 900WMaximum voltage: <12VMaximum current: 75AKV (rpm / volts): 3900KVMaximum rpm: 50000Diameter: 36mm/1.4inLength: 50mm/2.0inAxis length: 15mm/0.6inAxis diameter: 3.175mm/0.13inPlug Type: 4mm Golden Banana PlugESC Specifications:Continuous current: 60ABurst current: 320AApplicable battery: 2-3S lithium battery / 4-9S nickel-hydrogen nickel-cadmium battery (excluding)BEC output: 5.8V / 3APower plug: t plug maleMotor plug: 4mm banana plug femaleSteering gear parametersColor: goldWorking voltage: 4.8-6.8VWorking speed (6.0V): 0.15 seconds / 60 degreesWorking speed (7.4V): 0.13 seconds / 60 degreesStall Torque (6.0V) : 21kg/cm Stall Torque (7.4V) : 25kg/cm .Package List: 1 x Motor 1 x ESC 1 x Manual 1 x Steering Gear 1 x Metal Steering Gear Arm 5 x Plastic Steering Gear Arm 1 x Bag of Install Accessories(8PC) 7 x Screw