Digitrax RX4 Block Transponding Receivers -- 4-Block Unit

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For use with Block Occupancy Detector #245-BDL16, sold separately. Transponder receivers are the track level component that you use to set up the track sections where you want tran sponding to be active. You wont need to equip every track section to have adequate coverage in most cases. Visit the Digitrax Web site at www.digitrax.com for some ideas on equipping your layout with transponding. Show more