Newest design short CK tattoo machine pen for needle cartridge CK Cartridge Tattoo Machine precision DC motor, continuous operation, Low noise, Long-lasting stability, Light weight, unibody. Compatible with all cartridge needles. Motor: Germany motor Dimension: 29*96mm ?Voltage: 7-12V Input: DC2.0 Stroke: 3.5mm Needle Protrusion: 0-4mmLiner or Shader - Both Color – 5 colors Machine Type - Cartridge Rotary Machine?Motor Info and Max RPM - Swiss Made Faulhaber Coreless Motor & 12000RPM. These coreless motors also feature an extremely low rotor inertia and zero cogging or preferred rotor position, as well as a uniquely high, power to volume ratio. Universal Clamp - Can be used with Standard & Twistlock Grips. Twistlock grip is not included.1.Stable and powerful enough 2.Low vibration frame machine 3.Great weight front balance 4.It is easy to handle,suit any kinds of tattoo user. 5.Work powerful at quite low volt (we test it at 2-7 volt a whole day......url:http://www.redtoptattoo.com