Check the listing for details. Alltrax SR-72300 Controller for Series or Permanent Magnet Motors. Condition: New. Listed at 624.00 USD. Alltrax SR-72300 Series & Permanent Magnet Motor Controllers - With Fuse IMPORTANT: If you would like your controller pre-programmed before shipping, please tell us your cart's throttle type and battery pack voltage at checkout, otherwise it will be shipped with the factory default settings. Feel free to give us a call if you have questions. Alltrax SR-72300 Motor Controller - Fuse & Mounting Hardware Included For Series and Permanent Magnet Motors Features Color coded terminals 12-72 Volts 300 Amps Peak350 (Peak Amp Mode) Standard 4-spade Flexible USB programming Integrated heatsink mounts on any suitable surface Solenoid Control for Main DC Control Auto-throttle calibration for smooth operation Specifications DC motor controller for series and permanent magnet motorsABS + PC510 flame resistant thermal plastic enclosureAll copper heat sinksSealed epoxy UL-94-VO / 5VA flame rating (best in industry)Adjustable undervoltage cutback 8-58 VDCAdjustable overvoltage shutdown 30-90 VDCOperating Frequency: 18k HzVoltage drop @ 100amps: