Dynojet 323-411 Power Commander III USB Fuel Injection Module for Suzuki Boulevard VL1500 C90T 2005 & 2006. The Power Commander III USB utilizes the same"direct injector control" technology as the PCIII. The USB port provides an instant, no hassle way to connect the Power Commander module to a computer. This model also features an expansion port for add-on ignition modules. The PC is a fuel injection and ignition timing (on some models) adjustment unit that plugs "inline" with the bikes' stock ECU. The PC uses original equipment style connectors so that no splicing or cutting of the harness is required. Most installations take less than 15 minutes, some as little as 5 minutes. Changes are made to the bikes fuel and ignition curves via the PC's onboard microprocessor. Using this technology enables a large area of adjustment without making any permanent changes to the bikes' ECU (electronic control unit). Removing the PC returns the bike to its previous stock condition. The Power Commander can be ordered preprogrammed with a your choice of several settings, based on the modifications to your bike.