Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
The linear actuator has a 10K feedback pot but it is not needed by the operator for control, it is internally connected the internal circuit board.
The servo motor has power supply input, RED and BLACK heavy wires, and should have a socket (possibly 3pin) or three other wires that you use with standard servo PPM or PWM control.
The advanced internal circuit board is able to accept a PWM signal from about any servo controller which means that you can operate this unit from a wired servo controller such as our Dual Servo Driver or Servo Recorder, a wireless transmitter and receiver or even a microcontroller such as an Arduino. The closed-loop feedback allows the linear servo to be driven to any location within its stroke range by simply sending the corresponding signal to the servo from the servo controller. The internal circuit board is able to check the current position reading from the internal potentiometer and accurately control the position of the extension tube by supplying power to the motor until the called-for position has been reached.
Can you please tell us your electronics, programming, Arduino, hardware experience?
What is the application of the actuator?
Tom... 