Infrared connections use invisible flashing light (it’s invisible because it uses frequencies outside the range of human sight) to exchange data between computers, mobile telephones, digital cameras, and other devices. Most of the wireless remote control units that you use with your television, DVD player, and home stereo system also use infrared light signals. Infrared channels are often called IrDA connections, because the Infrared Data Association (IrDA) has set the standards for infrared communication.