Enjoy the ultimate freedom of wireless remote control … with the plug-and-play simplicity you expect from LGB! Just unplug the cable from your LGB 55015 Universal Remote or LGB 55016 Loco Remote. Then plug in this compact transmitter. It fits right inside the remote along with batteries (not included). That's all! On Multi-Train System layouts, you can use up to eight transmitter-equipped remotes with one Wireless Receiver. So you and your friends can all enjoy wireless freedom together!