Compatible with 25 brands Simple TV remote control functions Approximately 5 cm wide, 8 cm long The bottom of the box was torn when opened. I inserted batteries and tried to use it, but it didn't work, so I'm selling it. I haven't even had it for an hour, haha. The bottom of the box was torn during the opening, so please refrain from purchasing if you are concerned. It uses two AAA batteries. Thank you for looking.