Operating Needle length from 3.2mm-3.7mmSet with pen cap, safety and convenient;The working life is two twice longer than ordinary permanent makeup machines.Simple needle depth adjustmentpigment is easy to pierce into skinHigh-speed stabilityGo with speed control cord for better speedShorter treatment times Innovatively combines the handle and the motor unit into one unit without disassembly Specification:Material: aluminum alloySpeed: 10000 revolutions per minuteOperating voltage: 4-8VMotor:Swiss motor