Panasonic (TV model number TH-L19X50) TV remote control UR76DR4904. It was working without any problems until it was removed. I have also confirmed the infrared operation with a smartphone just in case. I think the back cover is also in good condition for its age. The spring above the batteries is slightly discolored, but there is no problem with electrical conductivity. For those who understand that this is USED, please.