?One-handed Operation?Defender X tattoo machine is EZ's first wireless pen that allows artists easily use one-handed controls.Equipped by the D click system, always keeps tattoo cartridges needle positions and accuracy remains consistent at all times. ?Memory Function?Tattoo wireless pen can adjust the voltage to the voltage setting that was saved when you stopped, and the starting voltage is the preset voltage of the last shutdown. It can record your tattoo work habits very well and become your right-hand man in work. ?Push Mode?Press ? and ? button at the same time, Screen LOGO solid, the machine ACTIVE the strong start mode. Press ? and ? button at the same time, Screen LOGO flashes,the machine push mode OFF. Note: In push mode the initial voltage output is 12V lasts for 1 second and then returns to normal voltage after. ?Stroke Length? Machine has an optional strokes 3.5mm(SILVER)and 4.0mm(BLACK), ensuring that the level of personalization on the machine, you’ll be able to more accurately perform your work.Built-in EZ Customized Swiss Motor,high speed,higher power,low noise and working stable. ?Fully Compatible?EZ tattoo pen is compatible with most standard tattoo cartridge needles types for liner, shader,flat magnum and curved magnum ,effortless to Cover and Protect.