All in one stepper motor has built in motor driver and controller hence no need of buying them separately. This motor has following salient features: #Selectable step resolutions #Optically isolated step, direction, disable/enable inputs #Automatic current reduction with disable switch #Operates on 12-24VDC #Low power dissipation #Efficient current control #Thermal shutdown #Power disable/enable control #Up to 85oz-in holding torque #20 microseconds step pulse width #20 microseconds step low time #Wide selection of motors available #Maximum power down recover time is 20 milliseconds #ISO9001 / CE approved manufacturer #Quick delivery