| | | The major differences between RIS 1.5 and 2.0 are the RIS software and the IR Tower. The software upgrade from RIS 1.5 to 2.0 is $19.99 (#3805) from LEGO's website. A USB IR Tower can be purchased from pldstore.com (W979783) for $29.00. There was no (...) (22 years ago, 16-Dec-02, to lugnet.robotics)
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