This 2.4ghz wireless Play Station 2 style controller works perfectly with BotBoarduino equipped robots.
They have a range of 10 meters, more when used outdoors.
Two analog joysticks and 16 buttons available for robot control.
The Robot Controller is actually a 2.4ghz wireless Play Station 2 game controller. It includes a small receiver module, level shifter with PS2 connector and two cables. The Robot Controller requires 3 "AAA" batteries (not included) for use.