[High Frequency]High frequency needle output makes the pigment finely injected into the skin, 5 gears rate are adjustable, can do the stable coloring, practical for us, Running Speed adjustable: Wireless Tattoo Machine running speed from 25000RPM to 45000 RPM. Needle length Accurate Scale: permanent makeup needles length can be adjust from 0mm to 2.5mm. [Operate Comfortably]Aluminum Alloy body, strong and durable, upgrate texture, the handle of the tattoo pen is easy to grip and operate, more convenient operation. Upgrate design, easy to control and cooperate, good performance.Can meet a variety of needs of you and make tattoo artists work easily..syi