arduino wireless controller

Hello, can anyone shed some light on this product? they did not really mention much about it on the instruction
http://www.ebay.com/itm/Wireless-Controller-Receiver-Refit-DIY-for-Arduino-Robot-Walking-Biped-Spider-/271172571133?pt=US_Radio_Control_Control_Line&hash=item3f23250ffd

  1. when the receiver is connected to the servo shield, it connects to the digital input if I'm not mistaken, does it mean that the controller controls it via PWM?
  2. what does AD1 and AD2 do based on the picture?
  3. will i be able to control a DC motor? for both rotation direction? i will be using a driver for this btw
  4. how many motor can i control ?

my knowledge is very much at an elementary stage and needs guidance thanks!

Hello, i buyed the same wireless controller, and im trying to use it whitout the "Servo Shield", only the receiver with arduino,,

Did you tried?
Do you know what does AD1 and AD2?

Thanks