This has been opened. Just the plastic. Has not been used or powered.
Motor does have a 5mm shaft.

Bottomline

• Excellent waterproof and dustproof performance, it is easy to deal with various climatic conditions and harsh environment.
  
• Smart freewheeling technology makes the esc have higher driving efficiency and lower operating temperature, and the stability and reliability of the esc are further improved.
  
• Built-in powerful switch mode BEC, continuous current up to 5A, instant up to 10A, and support 6V/7.4V adjustable, easy to drive various powerful and high-voltage steering servo.
  
• Multiple protection functions: battery low voltage protection, esc overheat protection, throttle signal loss protection, current protection, capacitor overheat protection.
  
• It has an independent programming port. When connecting the program card, it is not necessary to pull the throttle cable out of the receiver, which is more convenient to use.

Warning: Please carefully check power devices and manual of car frame to ensure the power pairing is reasonable. Avoid wrong pairing to overload and damage the motor. Always wire up all the parts of the equipment carefully. If any of the connections come loose as a result of vibration, your model RC may lose control. • Never apply full throttle if the pinion is not installed. Due to the extremely high RPMs without load, the motor may get damaged. Never allow the motor case to get 100 degrees Celsius (212 degrees Fahrenheit) because the magnets maybe demagnetized by high temperature.