Aeromotive's line of brushless pumps are available with two different built-in controllers: the Standard Configuration of Aeromotive's Brushless Controllers, which provides continuous full-speed operation, and the New True Variable Speed Controller (TVS), which offers the advantages of pump speed control vial a 0-5V analog DC input signal. The TVS Controller capitalizes on our existing brushless technology by reducing fuel flow during low-demand and decreasing an already low current draw, therefore minimizing the introduction of heat even further. Pump Features: 1,000 lbs./hr. @45psi Fuel Cell Drop-in, 10" Deep ORB-10 outlet port Extended service life in methanol and ethanol roller vane design that reduces friction and improves efficiency Integral, external brushless controller for clean installation, cooler fuel and enhanced reliability