SONY Sony system component remote control. I think it's quite old, but I'm not sure. I don't think there's any damage, but the remote control itself has discolored because it's old. It was working normally until about six months ago, before the main unit broke, but I don't know if it works now because I don't have the unit. The battery contacts are as shown in the photos. If you are interested, please consider. I won't be listing it for long. I, including my family, live in a smoke-free and pet-free environment. Thank you.