Scale Products offers two new types of LED signals for rules training and testing. The realistic high tensile aluminum 5' block signals for classroom use feature a handheld control box that allows the instructor to indicate any type of configuration including solid, flashing and even false signals, and can be battery operated for field use. For magnetic dry erase and chalk boards, SPC has developed a magnetic "AA" operated LED block signal that can indicate solid or flash on any of the three LED's with a simple pushbutton. Several units can be used to show consecutive blocks, and the units can be used on a portable signal mast for field training.