Busek’s micro-Pulsed Plasma Thrusters (μPPTs) have been in development since 2002 based upon technology originally developed at AFRL. These simple units feature no moving parts and non-toxic Teflon propellant. Each unit contains all the necessary electronics (PPU/DCIU), requiring only power and command input from the host spacecraft. Smaller, more advanced units are in active development for CubeSat propulsion systems.