• Interactive LCD screen and backlit keypad


• Connect via Windows/Mac PCs to receive updates, configure remote


• Replace up to 15 remote control devices


• Compatible with TVs, sound systems, and DVD players/recorders from over 3,000 electronics manufacturers


• Sound and Picture convenience buttons help you change picture aspect ratios and sound modes.

Read this links:

http://www.amazon.com/Logitech-550-Universal-Discontinued-Manufacturer/dp/B000EUGX70/ref=sr_1_1?ie=UTF8&qid=1444515146&sr=8-1&keywords=logitech+-+harmony+550