Used to control motorize or power sofa to TV position, full recline postion and close position. At the same time as resting, you can use the USB port to charge your mobile electronic devices, such as iPhone, iPad, MP3 player and other devices. The USB port is designed to supply 2A, 5V DC which is sufficient to charge almost all mobile devices , such as an Apple iPad. It shares the same adaptor which powers the motor for the motion upholstery and very easy to assembly on the sofa. Also the sophiscated protection circuit is bulit in to protect your mobile devices against the unexpected electric implus from AC, motor or something else.