Professor Motor PMTR2100 COMMERCIAL TRACK BASIC "NEW IMPROVED" Model Electronic Slot Racing Controller - Recommended Operating Voltage Range : 12 to 15 volts - POSITIVE polarity - DUAL internal aluminum heat sinks, heavy 13 gage silicone leads & solid copper alligator clips with color coded boots - Higher sensitivity for large commercial type tracks - "Platinum" Series transistor based technology - Recommended Applications : Commercial track racing through 16D & JK Falcon - Can be used for "House" or "Rental" Controllers NEW Improvements Over Prior Production with This Model New DUAL Heat Sinks Replace SINGLE Heat Sink New Wire Strain Relief added at bottom of handle for improved wire harness durability New CARBON CONTACT BUTTON for reduced maintenance requirements Higher Current INTERNAL CIRCUIT BREAKER for more current capability