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Redefining speed control, Control Chief says it has the most advanced Class I RCL Belly-Box™ in the railroad industry today. Known as the next-generation technology, the SCRR has advanced features as: X-Brite LED diagnostic displays visible in all lighting conditions, digital readouts, OCU weight of less than four pounds, IP-65 weather resistant Belly-Box design, internal antenna, transmitting range of up to 3,500 feet and employs a “hot swappable” battery system. The OCU also mimics in-cab brake stand control.