The pro is our newest addition to the pen family. Being completely wireless, with a unique and state of the art direct drive system, this pen allows artists to reach new potentials and achieve better results, easier. a brushless motor from.& 65288;While maintaining good stability, the hit is stronger. The strong blow is comparable to the coil machine& 65289; brushless motor (11.5v 10000rpm ) Stroke& 65306; 3.8 mm & 65039;This allows artists to work seamlessly in any environment without worrying about empty power packs or power black outs. & 65039;Power-pack key features: & 65039;-A display in which you can view all your parameteres such as voltage, presets etc. & 65039;-Controls to switch on and off the machine, adjust voltage and set favorite presets to quickly switch between your settings. -Of course, it can be used with all major cartridge brands as well as Ambition's cartridge system. -You'll be able to pick yours in three different colors: Black, Gold and Sliver. Instructions for 2 types of motors. Ambition motor is good with colour packing , lettering, traditional, Stroke& 65306; 3.8 mm