Arena smart tattoo rotary pen machine could be used lining, shading, color packer. Extra holder with this rotary pen machine, the tattoo process is more stable. Adjustable tattoo pen grip, erevolving around 360 degrees, more convenient. It can be connected to a power supply using an RCA cord. Simple style design frame - overall aviation aluminum body. Powerful coreless motor increased torque with less voltage. long-term work without hot. Designed for use with all tattoo cartridge needles in the market. Specifications: Motor: Coreless 8V/9000Rpm Stroke Length: 3.0mm Weight: 157g Colors: Black Working Voltage:5-8V Package includes: 1*Tattoo Rotary Machine 1*RCA cord