Nintendo Wii Sensor Bar (Assortment)
Yes, it comes with a cord
Yeah you need the sensor
Yes the Wii Sensor bar has an attached cord which needs to plug into the orange port. (There are two usb ports, then the two ports for the video/sound cords and the power cord.)
The cord is already attached to the sensor bar - if it comes without one - you may want to contact Game Stop about it since it's manufactured to have the cord attached.