Use this receiver with your wireless transmitters (LGB 55050). The receiver just connects to a Multi-Train System Central Station or an analog locomotive controller (LGB 51070). There are no frequencies to select, no batteries to charge, and no servos to adjust. Approximate wireless range: 15-20 meters / 50 to 65 feet. You can use up to three receivers simultaneously with the LGB MTS system to extend the range on very large layouts. On analog layouts you can use up to eight receivers with a matching number of locomotive controllers (LGB 51070) to control up to eight track current circuits. Note: The receiver is not weather-resistant and should be protected from direct exposure to moisture. For example, you can fit it in a model building on your layout. 80 x 70 x 20 mm / 3-1/8“ x 2-3/4“ x 3/4“.